diff --git a/src/appicon.c b/src/appicon.c
index 41e52e73..dbe7ae58 100644
--- a/src/appicon.c
+++ b/src/appicon.c
@@ -25,6 +25,7 @@
 #include <X11/Xlib.h>
 #include <X11/Xutil.h>
 #include <stdlib.h>
+#include <libgen.h>
 #include <string.h>
 #include <unistd.h>
 #include <sys/stat.h>
@@ -556,7 +557,6 @@ static void killCallback(WMenu * menu, WMenuEntry * entry)
 	WFakeGroupLeader *fPtr;
 	char *buffer;
 	char *shortname;
-	char *basename(const char *shortname);
 
 	if (!WCHECK_STATE(WSTATE_NORMAL))
 		return;
diff --git a/src/dock.c b/src/dock.c
index 3c3c150c..8bd72c29 100644
--- a/src/dock.c
+++ b/src/dock.c
@@ -26,6 +26,7 @@
 #include <X11/Xutil.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <libgen.h>
 #include <string.h>
 #include <strings.h>
 #include <unistd.h>
@@ -208,7 +209,6 @@ static void killCallback(WMenu *menu, WMenuEntry *entry)
 	WAppIcon *icon;
 	WFakeGroupLeader *fPtr;
 	char *buffer, *shortname, **argv;
-	char *basename(const char *shortname);
 	int argc;
 
 	if (!WCHECK_STATE(WSTATE_NORMAL))