--- src/event.c
+++ src/event.c
@@ -107,27 +107,27 @@
 
 
 static void saveTimestamp(XEvent *event);
-static void handleColormapNotify();
-static void handleMapNotify();
-static void handleUnmapNotify();
-static void handleButtonPress();
-static void handleExpose();
-static void handleDestroyNotify();
-static void handleConfigureRequest();
-static void handleMapRequest();
-static void handlePropertyNotify();
-static void handleEnterNotify();
-static void handleLeaveNotify();
-static void handleExtensions();
-static void handleClientMessage();
-static void handleKeyPress();
-static void handleFocusIn();
-static void handleMotionNotify();
-static void handleVisibilityNotify();
+static void handleColormapNotify(XEvent *event);
+static void handleMapNotify(XEvent *event);
+static void handleUnmapNotify(XEvent *event);
+static void handleButtonPress(XEvent *event);
+static void handleExpose(XEvent *event);
+static void handleDestroyNotify(XEvent *event);
+static void handleConfigureRequest(XEvent *event);
+static void handleMapRequest(XEvent *event);
+static void handlePropertyNotify(XEvent *event);
+static void handleEnterNotify(XEvent *event);
+static void handleLeaveNotify(XEvent *event);
+static void handleExtensions(XEvent *event);
+static void handleClientMessage(XEvent *event);
+static void handleKeyPress(XEvent *event);
+static void handleFocusIn(XEvent *event);
+static void handleMotionNotify(XEvent *event);
+static void handleVisibilityNotify(XEvent *event);
 
 
 #ifdef SHAPE
-static void handleShapeNotify();
+static void handleShapeNotify(XEvent *event);
 #endif
 
 /* called from the signal handler */