diff --git a/common/dga_check.c b/common/dga_check.c
index ad939c9..3a12f3d 100644
--- a/common/dga_check.c
+++ b/common/dga_check.c
@@ -39,7 +39,7 @@
 	Check for the presence of the XFree86-DGA X server extension
 */
 int
-VID_CheckDGA ( Display *dpy, Window *win )
+VID_CheckDGA ( Display *dpy )
 {
 	int event_base, error_base = 0;
 	
diff --git a/common/dga_check.h b/common/dga_check.h
index ecbf429..6f6acd3 100644
--- a/common/dga_check.h
+++ b/common/dga_check.h
@@ -42,14 +42,14 @@
 	
 	Check for the presence of the XFree86-DGA support in the X server
 */
-int VID_CheckDGA ( Display *dpy, Window *win );
+int VID_CheckDGA ( Display *dpy );
 
 /*
 	VID_CheckVMode
 	
 	Check for the presence of the XFree86-VMode X server extension
 */
-int VID_CheckVMode ( Display* );
+int VID_CheckVMode ( Display *dpy );
 
 #endif	// HAS_DGA