diff --git a/lib/libthr/thread/Makefile.inc b/lib/libthr/thread/Makefile.inc
index 47d009345018..5960756696dd 100644
--- a/lib/libthr/thread/Makefile.inc
+++ b/lib/libthr/thread/Makefile.inc
@@ -52,6 +52,5 @@ SRCS+= \
 	thr_suspend_np.c \
 	thr_switch_np.c \
 	thr_symbols.c \
-	thr_timer.c \
 	thr_umtx.c \
 	thr_yield.c