diff --git a/lib/strtok.h b/lib/strtok.h
index a68dd2d0f025777e96642708688a4f88a895e02e..023b051c7ce97a0ddf8f584586d773c5a0593858 100644
--- a/lib/strtok.h
+++ b/lib/strtok.h
@@ -28,8 +28,8 @@
 #include "setup.h"
 
 #ifndef HAVE_STRTOK_R
-char *curl_strtok_r(char *s, const char *delim, char **last);
-#define strtok_r curl_strtok_r
+char *Curl_strtok_r(char *s, const char *delim, char **last);
+#define strtok_r Curl_strtok_r
 #endif
 
 #endif