diff --git a/pjlib/include/pj/string.h b/pjlib/include/pj/string.h
index a8c39f6..5c2cc25 100644
--- a/pjlib/include/pj/string.h
+++ b/pjlib/include/pj/string.h
@@ -455,7 +455,7 @@
  * @param dst	    The destination string.
  * @param src	    The source string.
  */
-PJ_IDECL(void) pj_strcat2(pj_str_t *dst, const char *str);
+PJ_IDECL(void) pj_strcat2(pj_str_t *dst, const char *src);
 
 
 /**