diff --git a/Makefile b/Makefile
index 314b950..74d1d4b 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,7 @@ OBJ_DIR=obj
 EXE_DIR=bin
 
 SRC_SRC=fp.cpp
-TEST_SRC=fp_test.cpp ec_test.cpp fp_util_test.cpp window_method_test.cpp elgamal_test.cpp fp_tower_test.cpp
+TEST_SRC=fp_test.cpp ec_test.cpp fp_util_test.cpp window_method_test.cpp elgamal_test.cpp fp_tower_test.cpp gmp_test.cpp
 ifeq ($(CPU),x86-64)
   TEST_SRC+=fp_generator_test.cpp mont_fp_test.cpp
 endif