diff --git a/hw/xfree86/sdksyms.sh b/hw/xfree86/sdksyms.sh
index 22b698529f..732c3fb478 100755
--- a/hw/xfree86/sdksyms.sh
+++ b/hw/xfree86/sdksyms.sh
@@ -194,7 +194,6 @@ cat > sdksyms.c << EOF
 #include "mizerarc.h"
 #include "micoord.h"
 #include "mistruct.h"
-#include "mioverlay.h"
 
 
 /* randr/Makefile.am */
diff --git a/mi/meson.build b/mi/meson.build
index cde465a9be..ce8840b51c 100644
--- a/mi/meson.build
+++ b/mi/meson.build
@@ -33,7 +33,6 @@ hdrs_mi = [
   'migc.h',
   'mi.h',
   'miline.h',
-  'mioverlay.h',
   'mipointer.h',
   'mipointrst.h',
   'mistruct.h',
diff --git a/mi/mioverlay.c b/mi/mioverlay.c
index b55cc34365..a412bcf55c 100644
--- a/mi/mioverlay.c
+++ b/mi/mioverlay.c
@@ -1,8 +1,24 @@
-
 #include <dix-config.h>
 
 #include "windowstr.h"
-#include "mioverlay.h"
+
+/* this all is just left here for compat with proprietary Nvidia drivers */
+
+typedef void (*miOverlayTransFunc) (ScreenPtr, int, BoxPtr);
+typedef Bool (*miOverlayInOverlayFunc) (WindowPtr);
+
+_X_EXPORT Bool miInitOverlay(ScreenPtr pScreen,
+                             miOverlayInOverlayFunc inOverlay,
+                             miOverlayTransFunc trans);
+
+_X_EXPORT Bool miOverlayGetPrivateClips(WindowPtr pWin,
+                                        RegionPtr *borderClip,
+                                        RegionPtr *clipList);
+
+_X_EXPORT Bool miOverlayCollectUnderlayRegions(WindowPtr, RegionPtr *);
+_X_EXPORT void miOverlayComputeCompositeClip(GCPtr, WindowPtr);
+_X_EXPORT Bool miOverlayCopyUnderlay(ScreenPtr);
+_X_EXPORT void miOverlaySetRootClip(ScreenPtr, Bool);
 
 Bool
 miInitOverlay(ScreenPtr pScreen,
diff --git a/mi/mioverlay.h b/mi/mioverlay.h
deleted file mode 100644
index 1514e51b48..0000000000
--- a/mi/mioverlay.h
+++ /dev/null
@@ -1,26 +0,0 @@
-#ifndef __MIOVERLAY_H
-#define __MIOVERLAY_H
-
-#ifdef HAVE_DIX_CONFIG_H
-#include <dix-config.h>
-#endif
-
-typedef void (*miOverlayTransFunc) (ScreenPtr, int, BoxPtr);
-typedef Bool (*miOverlayInOverlayFunc) (WindowPtr);
-
-extern _X_EXPORT Bool
-
-miInitOverlay(ScreenPtr pScreen,
-              miOverlayInOverlayFunc inOverlay, miOverlayTransFunc trans);
-
-extern _X_EXPORT Bool
-
-miOverlayGetPrivateClips(WindowPtr pWin,
-                         RegionPtr *borderClip, RegionPtr *clipList);
-
-extern _X_EXPORT Bool miOverlayCollectUnderlayRegions(WindowPtr, RegionPtr *);
-extern _X_EXPORT void miOverlayComputeCompositeClip(GCPtr, WindowPtr);
-extern _X_EXPORT Bool miOverlayCopyUnderlay(ScreenPtr);
-extern _X_EXPORT void miOverlaySetRootClip(ScreenPtr, Bool);
-
-#endif                          /* __MIOVERLAY_H */