1 files changed, 1 insertions, 1 deletions
diff --git a/tests/glean/tapi2.h b/tests/glean/tapi2.h
index c4df77193..cb898f5d6 100644
--- a/tests/glean/tapi2.h
+++ b/tests/glean/tapi2.h
@@ -54,7 +54,7 @@ private:
         typedef bool (API2Test::*TestFunc)(void);
 
 	GLfloat tolerance[5];
-        bool getFunctions_2_0(char **errorFunc);
+        bool getFunctions_2_0(const char **errorFunc);
 
         GLuint loadAndCompileShader(GLenum target, const char *str);
         GLuint createProgram(GLuint vertShader, GLuint fragShader);