diff --git a/config/autoconf.mk.in b/config/autoconf.mk.in
index 061e4249cb26..76316f76a9d8 100644
--- a/config/autoconf.mk.in
+++ b/config/autoconf.mk.in
@@ -309,3 +309,4 @@ OS_TEST=@OS_TEST@
 # For OS/2 build
 MOZ_OS2_TOOLS = @MOZ_OS2_TOOLS@
 MOZ_OS2_EMX_OBJECTFORMAT = @MOZ_OS2_EMX_OBJECTFORMAT@
+MOZ_TIMER_LIBS = $(DIST)/lib/timer.$(LIB_SUFFIX)