diff --git a/src/xrt/include/xrt/xrt_gfx_xlib.h b/src/xrt/include/xrt/xrt_gfx_xlib.h
index f4adae384..c29cef607 100644
--- a/src/xrt/include/xrt/xrt_gfx_xlib.h
+++ b/src/xrt/include/xrt/xrt_gfx_xlib.h
@@ -17,7 +17,7 @@ extern "C" {
 #endif
 
 
-typedef void *Display;
+typedef struct _XDisplay Display;
 typedef void *GLXFBConfig;
 typedef void *GLXDrawable;
 typedef void *GLXContext;
diff --git a/src/xrt/include/xrt/xrt_openxr_includes.h b/src/xrt/include/xrt/xrt_openxr_includes.h
index f956fb3f9..012f2a9cc 100644
--- a/src/xrt/include/xrt/xrt_openxr_includes.h
+++ b/src/xrt/include/xrt/xrt_openxr_includes.h
@@ -14,7 +14,7 @@
 #define XR_USE_TIMESPEC 1
 
 #ifdef XR_USE_PLATFORM_XLIB
-typedef void *Display;
+typedef struct _XDisplay Display;
 typedef void *GLXFBConfig;
 typedef void *GLXDrawable;
 typedef void *GLXContext;