diff --git a/include/linux/string.h b/include/linux/string.h
index d36977e029af..e6edfe51575a 100644
--- a/include/linux/string.h
+++ b/include/linux/string.h
@@ -41,7 +41,7 @@ extern int strcmp(const char *,const char *);
 extern int strncmp(const char *,const char *,__kernel_size_t);
 #endif
 #ifndef __HAVE_ARCH_STRNICMP
-extern int strnicmp(const char *, const char *, __kernel_size_t);
+#define strnicmp strncasecmp
 #endif
 #ifndef __HAVE_ARCH_STRCASECMP
 extern int strcasecmp(const char *s1, const char *s2);
diff --git a/lib/string.c b/lib/string.c
index 3181e267a033..2fc20aa06f84 100644
--- a/lib/string.c
+++ b/lib/string.c
@@ -59,6 +59,7 @@ int strncasecmp(const char *s1, const char *s2, size_t len)
 EXPORT_SYMBOL(strncasecmp);
 #endif
 #ifndef __HAVE_ARCH_STRNICMP
+#undef strnicmp
 int strnicmp(const char *s1, const char *s2, size_t len)
 {
 	return strncasecmp(s1, s2, len);