diff --git a/builtin/add.c b/builtin/add.c
index 704141fddf..e57abddf52 100644
--- a/builtin/add.c
+++ b/builtin/add.c
@@ -331,8 +331,8 @@ static struct option builtin_add_options[] = {
 
 static int add_config(const char *var, const char *value, void *cb)
 {
-	if (!strcasecmp(var, "add.ignoreerrors") ||
-	    !strcasecmp(var, "add.ignore-errors")) {
+	if (!strcmp(var, "add.ignoreerrors") ||
+	    !strcmp(var, "add.ignore-errors")) {
 		ignore_add_errors = git_config_bool(var, value);
 		return 0;
 	}
diff --git a/merge-recursive.c b/merge-recursive.c
index ecb1806cad..07ad1a3be4 100644
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -1721,15 +1721,15 @@ int merge_recursive_generic(struct merge_options *o,
 static int merge_recursive_config(const char *var, const char *value, void *cb)
 {
 	struct merge_options *o = cb;
-	if (!strcasecmp(var, "merge.verbosity")) {
+	if (!strcmp(var, "merge.verbosity")) {
 		o->verbosity = git_config_int(var, value);
 		return 0;
 	}
-	if (!strcasecmp(var, "diff.renamelimit")) {
+	if (!strcmp(var, "diff.renamelimit")) {
 		o->diff_rename_limit = git_config_int(var, value);
 		return 0;
 	}
-	if (!strcasecmp(var, "merge.renamelimit")) {
+	if (!strcmp(var, "merge.renamelimit")) {
 		o->merge_rename_limit = git_config_int(var, value);
 		return 0;
 	}
diff --git a/xdiff-interface.c b/xdiff-interface.c
index 164581f87f..0e2c169227 100644
--- a/xdiff-interface.c
+++ b/xdiff-interface.c
@@ -347,7 +347,7 @@ int git_xmerge_style = -1;
 
 int git_xmerge_config(const char *var, const char *value, void *cb)
 {
-	if (!strcasecmp(var, "merge.conflictstyle")) {
+	if (!strcmp(var, "merge.conflictstyle")) {
 		if (!value)
 			die("'%s' is not a boolean", var);
 		if (!strcmp(value, "diff3"))