diff --git a/compat/strcasestr.h b/compat/strcasestr.h
index 71302516b3..0caa92f62a 100644
--- a/compat/strcasestr.h
+++ b/compat/strcasestr.h
@@ -28,10 +28,9 @@
 extern "C" {
 #endif
 
-extern char *strcasestr(const char *haystack, const char *needle);
-
 // Avoid possible naming collisions during link since we prefer to use the actual name.
 #define strcasestr(haystack, needle) strcasestr_rarch__(haystack, needle)
+char *strcasestr(const char *haystack, const char *needle);
 
 #ifdef __cplusplus
 }