diff --git a/content/base/public/nsContentUtils.h b/content/base/public/nsContentUtils.h
index 17f2aaafd187..ce000ee150d7 100644
--- a/content/base/public/nsContentUtils.h
+++ b/content/base/public/nsContentUtils.h
@@ -1410,16 +1410,9 @@ public:
  * https://bugzilla.mozilla.org/show_bug.cgi?id=369418#c63 . To play it safe
  * for gecko 1.9, we just reuse JSDOUBLE_IS_FINITE.
  */
-#if 0
-// stop this from causing mochitests to fail
 inline NS_HIDDEN_(PRBool) NS_FloatIsFinite(jsdouble f) {
   return JSDOUBLE_IS_FINITE(f);
 }
-#else
-inline NS_HIDDEN_(PRBool) NS_FloatIsFinite(float f) {
-  return PR_TRUE;
-}
-#endif
 
 /*
  * In the following helper macros we exploit the fact that the result of a