diff --git a/src/wmspec.c b/src/wmspec.c
index 94e55a88..f73f1501 100644
--- a/src/wmspec.c
+++ b/src/wmspec.c
@@ -229,6 +229,7 @@ static void updateClientListStacking(WScreen * scr, WWindow *);
 static void updateWorkspaceNames(WScreen * scr);
 static void updateCurrentWorkspace(WScreen * scr);
 static void updateWorkspaceCount(WScreen * scr);
+static void wNETWMShowingDesktop(WScreen *scr, Bool show);
 
 typedef struct NetData {
 	WScreen *scr;
@@ -486,7 +487,7 @@ static void updateShowDesktop(WScreen * scr, Bool show)
 			PropModeReplace, (unsigned char *)&foo, 1);
 }
 
-void wNETWMShowingDesktop(WScreen * scr, Bool show)
+static void wNETWMShowingDesktop(WScreen *scr, Bool show)
 {
 	if (show && scr->netdata->show_desktop == NULL) {
 		WWindow *tmp, **wins;
diff --git a/src/wmspec.h b/src/wmspec.h
index 03376846..e7438dc9 100644
--- a/src/wmspec.h
+++ b/src/wmspec.h
@@ -36,7 +36,6 @@ Bool wNETWMCheckInitialClientState(WWindow *wwin);
 Bool wNETWMProcessClientMessage(XClientMessageEvent *event);
 Bool wNETWMCheckClientHints(WWindow *wwin, int *layer, int *workspace);
 Bool wNETWMCheckClientHintChange(WWindow *wwin, XPropertyEvent *event);
-void wNETWMShowingDesktop(WScreen *scr, Bool show);
 void wNETWMUpdateActions(WWindow *wwin, Bool del);
 void wNETWMUpdateDesktop(WScreen *scr);
 void wNETWMPositionSplash(WWindow *wwin, int *x, int *y, int width, int height);