diff --git a/WINGs/wcolorpanel.c b/WINGs/wcolorpanel.c
index ab70dd2a..78e5649d 100644
--- a/WINGs/wcolorpanel.c
+++ b/WINGs/wcolorpanel.c
@@ -2321,6 +2321,9 @@ static void grayBrightnessTextFieldCallback(void *observerData, WMNotification *
 	int value;
 	W_ColorPanel *panel = (W_ColorPanel *) observerData;
 
+	/* Parameter not used, but tell the compiler that it is ok */
+	(void) notification;
+
 	value = atoi(WMGetTextFieldText(panel->grayBrightnessT));
 	if (value > 100)
 		value = 100;
@@ -2375,6 +2378,9 @@ static void rgbTextFieldCallback(void *observerData, WMNotification * notificati
 	int n;
 	W_ColorPanel *panel = (W_ColorPanel *) observerData;
 
+	/* Parameter not used, but tell the compiler that it is ok */
+	(void) notification;
+
 	value[0] = atoi(WMGetTextFieldText(panel->rgbRedT));
 	value[1] = atoi(WMGetTextFieldText(panel->rgbGreenT));
 	value[2] = atoi(WMGetTextFieldText(panel->rgbBlueT));
@@ -2449,6 +2455,9 @@ static void cmykTextFieldCallback(void *observerData, WMNotification * notificat
 	double scale;
 	W_ColorPanel *panel = (W_ColorPanel *) observerData;
 
+	/* Parameter not used, but tell the compiler that it is ok */
+	(void) notification;
+
 	value[0] = atoi(WMGetTextFieldText(panel->cmykCyanT));
 	value[1] = atoi(WMGetTextFieldText(panel->cmykMagentaT));
 	value[2] = atoi(WMGetTextFieldText(panel->cmykYellowT));
@@ -2534,6 +2543,9 @@ static void hsbTextFieldCallback(void *observerData, WMNotification * notificati
 	int n;
 	W_ColorPanel *panel = (W_ColorPanel *) observerData;
 
+	/* Parameter not used, but tell the compiler that it is ok */
+	(void) notification;
+
 	value[0] = atoi(WMGetTextFieldText(panel->hsbHueT));
 	value[1] = atoi(WMGetTextFieldText(panel->hsbSaturationT));
 	value[2] = atoi(WMGetTextFieldText(panel->hsbBrightnessT));
diff --git a/WINGs/wlist.c b/WINGs/wlist.c
index f15e900f..6e69a346 100644
--- a/WINGs/wlist.c
+++ b/WINGs/wlist.c
@@ -92,6 +92,9 @@ static void updateDoubleBufferPixmap(WMList * lPtr)
 
 static void realizeObserver(void *self, WMNotification * not)
 {
+	/* Parameter not used, but tell the compiler that it is ok */
+	(void) not;
+
 	updateDoubleBufferPixmap(self);
 }
 
diff --git a/WINGs/wslider.c b/WINGs/wslider.c
index f1f43fb1..839930e1 100644
--- a/WINGs/wslider.c
+++ b/WINGs/wslider.c
@@ -49,6 +49,9 @@ static void makeKnobPixmap(Slider * sPtr);
 
 static void realizeObserver(void *self, WMNotification * not)
 {
+	/* Parameter not used, but tell the compiler that it is ok */
+	(void) not;
+
 	makeKnobPixmap(self);
 }
 
diff --git a/WINGs/wsplitview.c b/WINGs/wsplitview.c
index e1dcd815..38b2cb39 100644
--- a/WINGs/wsplitview.c
+++ b/WINGs/wsplitview.c
@@ -351,6 +351,9 @@ static void handleViewResized(void *self, WMNotification * notification)
 {
 	WMSplitView *sPtr = (WMSplitView *) self;
 
+	/* Parameter not used, but tell the compiler that it is ok */
+	(void) notification;
+
 #if 0
 	printf("---- (handleViewResized - 1) ----\n");
 	dumpSubviews(sPtr);
diff --git a/WINGs/wtextfield.c b/WINGs/wtextfield.c
index 1b3baa5a..be0fc41e 100644
--- a/WINGs/wtextfield.c
+++ b/WINGs/wtextfield.c
@@ -307,6 +307,9 @@ static void selectionNotification(void *observerData, WMNotification * notificat
 
 static void realizeObserver(void *self, WMNotification * not)
 {
+	/* Parameter not used, but tell the compiler that it is ok */
+	(void) not;
+
 	W_CreateIC(((TextField *) self)->view);
 }
 
diff --git a/WINGs/wwindow.c b/WINGs/wwindow.c
index d3ad4aa6..139cb53a 100644
--- a/WINGs/wwindow.c
+++ b/WINGs/wwindow.c
@@ -95,6 +95,9 @@ static void realizeWindow(WMWindow * win);
 
 static void realizeObserver(void *self, WMNotification * not)
 {
+	/* Parameter not used, but tell the compiler that it is ok */
+	(void) not;
+
 	realizeWindow(self);
 }