diff --git a/Makefile b/Makefile
index 57d9c65e03..ff35154375 100644
--- a/Makefile
+++ b/Makefile
@@ -1003,6 +1003,7 @@ ifeq ($(uname_S),IRIX)
 	# issue, comment out the NO_MMAP statement.
 	NO_MMAP = YesPlease
 	NO_REGEX = YesPlease
+	NO_FNMATCH_CASEFOLD = YesPlease
 	SNPRINTF_RETURNS_BOGUS = YesPlease
 	SHELL_PATH = /usr/gnu/bin/bash
 	NEEDS_LIBGEN = YesPlease
@@ -1022,6 +1023,7 @@ ifeq ($(uname_S),IRIX64)
 	# issue, comment out the NO_MMAP statement.
 	NO_MMAP = YesPlease
 	NO_REGEX = YesPlease
+	NO_FNMATCH_CASEFOLD = YesPlease
 	SNPRINTF_RETURNS_BOGUS = YesPlease
 	SHELL_PATH=/usr/gnu/bin/bash
 	NEEDS_LIBGEN = YesPlease