diff --git a/content/canvas/src/WebGLContextGL.cpp b/content/canvas/src/WebGLContextGL.cpp
index c78e766a5c6..e74491fc122 100644
--- a/content/canvas/src/WebGLContextGL.cpp
+++ b/content/canvas/src/WebGLContextGL.cpp
@@ -2085,7 +2085,18 @@ WebGLContext::GetProgramParameter(nsIWebGLProgram *pobj, PRUint32 pname, nsIVari
         case LOCAL_GL_VALIDATE_STATUS:
         {
             GLint i = 0;
+#ifdef XP_MACOSX
+            if (pname == LOCAL_GL_VALIDATE_STATUS &&
+                gl->Vendor() == gl::GLContext::VendorNVIDIA)
+            {
+                // See comment in ValidateProgram below.
+                i = 1;
+            } else {
+                gl->fGetProgramiv(progname, pname, &i);
+            }
+#else
             gl->fGetProgramiv(progname, pname, &i);
+#endif
             wrval->SetAsBool(PRBool(i));
         }
             break;