diff --git a/lib/gpu/Makefile.fermi b/lib/gpu/Makefile.fermi
index 1618e60c10..6858d41736 100644
--- a/lib/gpu/Makefile.fermi
+++ b/lib/gpu/Makefile.fermi
@@ -28,7 +28,7 @@ CUDA_LIB = -L$(CUDA_HOME)/lib64 -Xlinker -rpath -Xlinker $(CUDA_HOME)/lib64 -lcu
 CUDA_OPTS = -DUNIX -O3 -Xptxas -v --use_fast_math 
 
 CUDR_CPP = mpic++ -DMPI_GERYON -I$(CUDA_HOME)/include 
-CUDR_OPTS = -O2 -fno-rtti -fno-exceptions -mpc64 -march=native -ffast-math -funroll-loops -DMPI_GERYON
+CUDR_OPTS = -O2 -Wall -fno-rtti -fno-exceptions -mpc64 -march=native -ffast-math -funroll-loops -DMPI_GERYON
 
 BIN_DIR = ./
 OBJ_DIR = ./obj