diff --git a/src/css-url.h b/src/css-url.h
index 16959019..92ce6b11 100644
--- a/src/css-url.h
+++ b/src/css-url.h
@@ -31,7 +31,6 @@ as that of the covered work.  */
 #ifndef CSS_URL_H
 #define CSS_URL_H
 
-void get_urls_css (struct map_context *, int, int);
 void get_urls_css (struct map_context *, int, int);
 struct urlpos *get_urls_css_file (const char *, const char *);