diff --git a/arch/ppc/lib/strcase.c b/arch/ppc/lib/strcase.c
index 36b521091bbc5a19df487e023925a59c60848685..d9885789061928068c027d2514cf8e76e8a3464a 100644
--- a/arch/ppc/lib/strcase.c
+++ b/arch/ppc/lib/strcase.c
@@ -11,7 +11,7 @@ int strcasecmp(const char *s1, const char *s2)
 	return c1 - c2;
 }
 
-int strncasecmp(const char *s1, const char *s2, int n)
+int strncasecmp(const char *s1, const char *s2, size_t n)
 {
 	int c1, c2;