diff --git a/modules/libpref/src/Makefile.in b/modules/libpref/src/Makefile.in
index e4ca661d02c..89969bbb070 100644
--- a/modules/libpref/src/Makefile.in
+++ b/modules/libpref/src/Makefile.in
@@ -30,15 +30,6 @@ grepref_files += $(topsrcdir)/mobile/android/chrome/content/healthreport-prefs.j
 endif
 endif
 
-# Optimizer bug with GCC 3.2.2 on OS/2
-ifeq ($(OS_ARCH), OS2)
-nsPrefService.$(OBJ_SUFFIX): nsPrefService.cpp
-	$(REPORT_BUILD)
-	@$(MAKE_DEPS_AUTO_CXX)
-	$(ELOG) $(CCC) $(OUTOPTION)$@ -c $(COMPILE_CXXFLAGS:-O2=-O1) $(_VPATH_SRCS)
-endif
-
-
 greprefs.js: $(grepref_files)
 	$(call py_action,preprocessor,$(PREF_PPFLAGS) $(DEFINES) $(ACDEFINES) $(XULPPFLAGS) $^ -o $@)