diff --git a/git-p4.py b/git-p4.py
index 2d83aa883c..565cfbcc78 100755
--- a/git-p4.py
+++ b/git-p4.py
@@ -133,25 +133,29 @@ def p4_system(cmd):
     subprocess.check_call(real_cmd, shell=expand)
 
 def p4_integrate(src, dest):
-    p4_system(["integrate", "-Dt", src, dest])
+    p4_system(["integrate", "-Dt", wildcard_encode(src), wildcard_encode(dest)])
 
 def p4_sync(f, *options):
-    p4_system(["sync"] + list(options) + [f])
+    p4_system(["sync"] + list(options) + [wildcard_encode(f)])
 
 def p4_add(f):
-    p4_system(["add", f])
+    # forcibly add file names with wildcards
+    if wildcard_present(f):
+        p4_system(["add", "-f", f])
+    else:
+        p4_system(["add", f])
 
 def p4_delete(f):
-    p4_system(["delete", f])
+    p4_system(["delete", wildcard_encode(f)])
 
 def p4_edit(f):
-    p4_system(["edit", f])
+    p4_system(["edit", wildcard_encode(f)])
 
 def p4_revert(f):
-    p4_system(["revert", f])
+    p4_system(["revert", wildcard_encode(f)])
 
-def p4_reopen(type, file):
-    p4_system(["reopen", "-t", type, file])
+def p4_reopen(type, f):
+    p4_system(["reopen", "-t", type, wildcard_encode(f)])
 
 #
 # Canonicalize the p4 type and return a tuple of the
@@ -248,7 +252,7 @@ def setP4ExecBit(file, mode):
 def getP4OpenedType(file):
     # Returns the perforce file type for the given file.
 
-    result = p4_read_pipe(["opened", file])
+    result = p4_read_pipe(["opened", wildcard_encode(file)])
     match = re.match(".*\((.+)\)\r?$", result)
     if match:
         return match.group(1)
@@ -658,6 +662,34 @@ def getClientRoot():
 
     return entry["Root"]
 
+#
+# P4 wildcards are not allowed in filenames.  P4 complains
+# if you simply add them, but you can force it with "-f", in
+# which case it translates them into %xx encoding internally.
+#
+def wildcard_decode(path):
+    # Search for and fix just these four characters.  Do % last so
+    # that fixing it does not inadvertently create new %-escapes.
+    # Cannot have * in a filename in windows; untested as to
+    # what p4 would do in such a case.
+    if not platform.system() == "Windows":
+        path = path.replace("%2A", "*")
+    path = path.replace("%23", "#") \
+               .replace("%40", "@") \
+               .replace("%25", "%")
+    return path
+
+def wildcard_encode(path):
+    # do % first to avoid double-encoding the %s introduced here
+    path = path.replace("%", "%25") \
+               .replace("*", "%2A") \
+               .replace("#", "%23") \
+               .replace("@", "%40")
+    return path
+
+def wildcard_present(path):
+    return path.translate(None, "*#@%") != path
+
 class Command:
     def __init__(self):
         self.usage = "usage: %prog [options]"
@@ -1187,7 +1219,8 @@ def applyCommit(self, id):
                 del(os.environ["P4DIFF"])
             diff = ""
             for editedFile in editedFiles:
-                diff += p4_read_pipe(['diff', '-du', editedFile])
+                diff += p4_read_pipe(['diff', '-du',
+                                      wildcard_encode(editedFile)])
 
             newdiff = ""
             for newFile in filesToAdd:
@@ -1697,23 +1730,6 @@ def __init__(self):
         if gitConfig("git-p4.syncFromOrigin") == "false":
             self.syncWithOrigin = False
 
-    #
-    # P4 wildcards are not allowed in filenames.  P4 complains
-    # if you simply add them, but you can force it with "-f", in
-    # which case it translates them into %xx encoding internally.
-    # Search for and fix just these four characters.  Do % last so
-    # that fixing it does not inadvertently create new %-escapes.
-    #
-    def wildcard_decode(self, path):
-        # Cannot have * in a filename in windows; untested as to
-        # what p4 would do in such a case.
-        if not self.isWindows:
-            path = path.replace("%2A", "*")
-        path = path.replace("%23", "#") \
-                   .replace("%40", "@") \
-                   .replace("%25", "%")
-        return path
-
     # Force a checkpoint in fast-import and wait for it to finish
     def checkpoint(self):
         self.gitStream.write("checkpoint\n\n")
@@ -1781,6 +1797,7 @@ def splitFilesIntoBranches(self, commit):
             fnum = fnum + 1
 
             relPath = self.stripRepoPath(path, self.depotPaths)
+            relPath = wildcard_decode(relPath)
 
             for branch in self.knownBranches.keys():
 
@@ -1798,7 +1815,7 @@ def splitFilesIntoBranches(self, commit):
 
     def streamOneP4File(self, file, contents):
         relPath = self.stripRepoPath(file['depotFile'], self.branchPrefixes)
-        relPath = self.wildcard_decode(relPath)
+        relPath = wildcard_decode(relPath)
         if verbose:
             sys.stderr.write("%s\n" % relPath)
 
@@ -1867,6 +1884,7 @@ def streamOneP4File(self, file, contents):
 
     def streamOneP4Deletion(self, file):
         relPath = self.stripRepoPath(file['path'], self.branchPrefixes)
+        relPath = wildcard_decode(relPath)
         if verbose:
             sys.stderr.write("delete %s\n" % relPath)
         self.gitStream.write("D %s\n" % relPath)
diff --git a/t/t9800-git-p4-basic.sh b/t/t9800-git-p4-basic.sh
index b2f08697ad..0f410c45f7 100755
--- a/t/t9800-git-p4-basic.sh
+++ b/t/t9800-git-p4-basic.sh
@@ -163,6 +163,112 @@ test_expect_success 'wildcard files git p4 clone' '
 	)
 '
 
+test_expect_success 'wildcard files submit back to p4, add' '
+	test_when_finished cleanup_git &&
+	git p4 clone --dest="$git" //depot &&
+	(
+		cd "$git" &&
+		echo git-wild-hash >git-wild#hash &&
+		echo git-wild-star >git-wild\*star &&
+		echo git-wild-at >git-wild@at &&
+		echo git-wild-percent >git-wild%percent &&
+		git add git-wild* &&
+		git commit -m "add some wildcard filenames" &&
+		git config git-p4.skipSubmitEdit true &&
+		git p4 submit
+	) &&
+	(
+		cd "$cli" &&
+		test_path_is_file git-wild#hash &&
+		test_path_is_file git-wild\*star &&
+		test_path_is_file git-wild@at &&
+		test_path_is_file git-wild%percent
+	)
+'
+
+test_expect_success 'wildcard files submit back to p4, modify' '
+	test_when_finished cleanup_git &&
+	git p4 clone --dest="$git" //depot &&
+	(
+		cd "$git" &&
+		echo new-line >>git-wild#hash &&
+		echo new-line >>git-wild\*star &&
+		echo new-line >>git-wild@at &&
+		echo new-line >>git-wild%percent &&
+		git add git-wild* &&
+		git commit -m "modify the wildcard files" &&
+		git config git-p4.skipSubmitEdit true &&
+		git p4 submit
+	) &&
+	(
+		cd "$cli" &&
+		test_line_count = 2 git-wild#hash &&
+		test_line_count = 2 git-wild\*star &&
+		test_line_count = 2 git-wild@at &&
+		test_line_count = 2 git-wild%percent
+	)
+'
+
+test_expect_success 'wildcard files submit back to p4, copy' '
+	test_when_finished cleanup_git &&
+	git p4 clone --dest="$git" //depot &&
+	(
+		cd "$git" &&
+		cp file2 git-wild-cp#hash &&
+		git add git-wild-cp#hash &&
+		cp git-wild\*star file-wild-3 &&
+		git add file-wild-3 &&
+		git commit -m "wildcard copies" &&
+		git config git-p4.detectCopies true &&
+		git config git-p4.detectCopiesHarder true &&
+		git config git-p4.skipSubmitEdit true &&
+		git p4 submit
+	) &&
+	(
+		cd "$cli" &&
+		test_path_is_file git-wild-cp#hash &&
+		test_path_is_file file-wild-3
+	)
+'
+
+test_expect_success 'wildcard files submit back to p4, rename' '
+	test_when_finished cleanup_git &&
+	git p4 clone --dest="$git" //depot &&
+	(
+		cd "$git" &&
+		git mv git-wild@at file-wild-4 &&
+		git mv file-wild-3 git-wild-cp%percent &&
+		git commit -m "wildcard renames" &&
+		git config git-p4.detectRenames true &&
+		git config git-p4.skipSubmitEdit true &&
+		git p4 submit
+	) &&
+	(
+		cd "$cli" &&
+		test_path_is_missing git-wild@at &&
+		test_path_is_file git-wild-cp%percent
+	)
+'
+
+test_expect_success 'wildcard files submit back to p4, delete' '
+	test_when_finished cleanup_git &&
+	git p4 clone --dest="$git" //depot &&
+	(
+		cd "$git" &&
+		git rm git-wild* &&
+		git commit -m "delete the wildcard files" &&
+		git config git-p4.skipSubmitEdit true &&
+		git p4 submit
+	) &&
+	(
+		cd "$cli" &&
+		test_path_is_missing git-wild#hash &&
+		test_path_is_missing git-wild\*star &&
+		test_path_is_missing git-wild@at &&
+		test_path_is_missing git-wild%percent
+	)
+'
+
 test_expect_success 'clone bare' '
 	git p4 clone --dest="$git" --bare //depot &&
 	test_when_finished cleanup_git &&
diff --git a/t/t9809-git-p4-client-view.sh b/t/t9809-git-p4-client-view.sh
index 43ed1feedf..7d993ef80a 100755
--- a/t/t9809-git-p4-client-view.sh
+++ b/t/t9809-git-p4-client-view.sh
@@ -374,6 +374,39 @@ test_expect_success 'subdir clone, submit rename' '
 	)
 '
 
+# see t9800 for the non-client-spec case, and the rest of the wildcard tests
+test_expect_success 'wildcard files submit back to p4, client-spec case' '
+	client_view "//depot/... //client/..." &&
+	test_when_finished cleanup_git &&
+	git p4 clone --use-client-spec --dest="$git" //depot/dir1 &&
+	(
+		cd "$git" &&
+		echo git-wild-hash >dir1/git-wild#hash &&
+		echo git-wild-star >dir1/git-wild\*star &&
+		echo git-wild-at >dir1/git-wild@at &&
+		echo git-wild-percent >dir1/git-wild%percent &&
+		git add dir1/git-wild* &&
+		git commit -m "add some wildcard filenames" &&
+		git config git-p4.skipSubmitEditCheck true &&
+		git p4 submit
+	) &&
+	(
+		cd "$cli" &&
+		test_path_is_file dir1/git-wild#hash &&
+		test_path_is_file dir1/git-wild\*star &&
+		test_path_is_file dir1/git-wild@at &&
+		test_path_is_file dir1/git-wild%percent
+	) &&
+	(
+		# delete these carefully, cannot just do "p4 delete"
+		# on files with wildcards; but git-p4 knows how
+		cd "$git" &&
+		git rm dir1/git-wild* &&
+		git commit -m "clean up the wildcards" &&
+		git p4 submit
+	)
+'
+
 test_expect_success 'reinit depot' '
 	(
 		cd "$cli" &&