diff --git a/Makefile b/Makefile
index 609dc50..dc27c2a 100644
--- a/Makefile
+++ b/Makefile
@@ -3307,6 +3307,7 @@
 LIBQPS_SRC = \
     $(GENDIR)/test/cpp/qps/qpstest.pb.cc \
     test/cpp/qps/driver.cc \
+    test/cpp/qps/timer.cc \
 
 
 LIBQPS_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBQPS_SRC))))
@@ -3335,6 +3336,7 @@
 # otherwise parallel compilation will fail if a source is compiled first.
 test/cpp/qps/qpstest.proto: $(OPENSSL_DEP)
 test/cpp/qps/driver.cc: $(OPENSSL_DEP)
+test/cpp/qps/timer.cc: $(OPENSSL_DEP)
 endif
 
 $(LIBDIR)/$(CONFIG)/libqps.a: $(ZLIB_DEP) $(OPENSSL_DEP) $(PROTOBUF_DEP) $(LIBQPS_OBJS)
@@ -3361,6 +3363,7 @@
 
 
 $(OBJDIR)/$(CONFIG)/test/cpp/qps/driver.o:     $(GENDIR)/test/cpp/qps/qpstest.pb.cc
+$(OBJDIR)/$(CONFIG)/test/cpp/qps/timer.o:     $(GENDIR)/test/cpp/qps/qpstest.pb.cc
 
 
 LIBGRPC_CSHARP_EXT_SRC = \