--- a/config/config.mk
+++ b/config/config.mk
@@ -651,16 +651,22 @@ DEFINES +=  -DXPCONNECT_STANDALONE
 endif
 
 ifeq ($(OS_ARCH),OS2)
 ELF_DYNSTR_GC	= echo
 else
 ELF_DYNSTR_GC	= :
 endif
 
+ifndef MOZILLA_1_9_2_BRANCH
+ifeq ($(MOZ_WIDGET_TOOLKIT),qt)
+OS_LIBS += $(MOZ_QT_LIBS)
+endif
+endif # ! MOZILLA_1_9_2_BRANCH
+
 ifndef CROSS_COMPILE
 ifdef USE_ELF_DYNSTR_GC
 ifdef MOZ_COMPONENTS_VERSION_SCRIPT_LDFLAGS
 ELF_DYNSTR_GC 	= $(MOZDEPTH)/config/elf-dynstr-gc
 endif
 endif
 endif