diff --git a/repos/os/src/test/cpu_bench/target.mk b/repos/os/src/test/cpu_bench/target.mk
index a61148ad85..38669cdda2 100644
--- a/repos/os/src/test/cpu_bench/target.mk
+++ b/repos/os/src/test/cpu_bench/target.mk
@@ -2,3 +2,4 @@ TARGET  = test-cpu
 SRC_CC  = main.cc
 INC_DIR = $(PRG_DIR)
 LIBS    = base
+CC_WARN = -Wno-register