diff --git a/src/gallium/state_trackers/wgl/stw_ext_context.c b/src/gallium/state_trackers/wgl/stw_ext_context.c
index fc866892175..4171987f89c 100644
--- a/src/gallium/state_trackers/wgl/stw_ext_context.c
+++ b/src/gallium/state_trackers/wgl/stw_ext_context.c
@@ -179,8 +179,8 @@ wglCreateContextAttribsARB(HDC hDC, HGLRC hShareContext, const int *attribList)
       }
       else {
          /* not using ICD */
-         dhglrc = (DHGLRC) context;
-         share_dhglrc = (DHGLRC) hShareContext;
+         dhglrc = (DHGLRC)(INT_PTR)context;
+         share_dhglrc = (DHGLRC)(INT_PTR)hShareContext;
       }
 
       c = stw_create_context_attribs(hDC, layerPlane, share_dhglrc,
diff --git a/src/gallium/state_trackers/wgl/stw_wgl.c b/src/gallium/state_trackers/wgl/stw_wgl.c
index 44315827112..9103c750ea9 100644
--- a/src/gallium/state_trackers/wgl/stw_wgl.c
+++ b/src/gallium/state_trackers/wgl/stw_wgl.c
@@ -68,7 +68,7 @@ wglCreateContext(
    HDC hdc )
 {
    overrideOpenGL32EntryPoints();
-   return (HGLRC) DrvCreateContext(hdc);
+   return (HGLRC)(UINT_PTR)DrvCreateContext(hdc);
 }
 
 WINGDIAPI HGLRC APIENTRY
@@ -77,7 +77,7 @@ wglCreateLayerContext(
    int iLayerPlane )
 {
    overrideOpenGL32EntryPoints();
-   return (HGLRC) DrvCreateLayerContext( hdc, iLayerPlane );
+   return (HGLRC)(UINT_PTR)DrvCreateLayerContext( hdc, iLayerPlane );
 }
 
 WINGDIAPI BOOL APIENTRY