diff --git a/auto/src/glew_str_glx.c b/auto/src/glew_str_glx.c
index e841475..785c23a 100644
--- a/auto/src/glew_str_glx.c
+++ b/auto/src/glew_str_glx.c
@@ -4,7 +4,7 @@
   return ret;
 }
 
-#elif !defined(__ANDROID__) && !defined(__native_client__) && !defined(__HAIKU__) && !defined(__APPLE__) || defined(GLEW_APPLE_GLX)
+#elif !defined(GLEW_OSMESA) && !defined(__ANDROID__) && !defined(__native_client__) && !defined(__HAIKU__) && !defined(__APPLE__) || defined(GLEW_APPLE_GLX)
 
 #if defined(GLEW_MX)
 GLboolean glxewContextIsSupported (const GLXEWContext* ctx, const char* name)