--- a/toolkit/library/gtest/Makefile.in
+++ b/toolkit/library/gtest/Makefile.in
@@ -3,16 +3,22 @@
 # You can obtain one at http://mozilla.org/MPL/2.0/.
 
 # Enforce that the clean/distclean rules removes everything that needs
 # to be removed from this directory.
 ifneq (,$(filter clean distclean,$(MAKECMDGOALS)))
 LINK_GTEST_DURING_COMPILE = 1
 endif
 
+# Don't link the gtest xul during MOZ_PROFILE_GENERATE, it doesn't get
+# used during profiling anyway.
+ifdef MOZ_PROFILE_GENERATE
+LINK_GTEST_DURING_COMPILE =
+endif
+
 ifndef LINK_GTEST_DURING_COMPILE
 # Force to not include backend.mk unless LINK_GTEST_DURING_COMPILE is set.
 # Not including backend.mk makes traversing this directory do nothing.
 STANDALONE_MAKEFILE = 1
 
 else
 
 include $(topsrcdir)/toolkit/library/libxul.mk