diff --git a/OpenACC.make b/OpenACC.make
index 061a9e0b..161c20e8 100644
--- a/OpenACC.make
+++ b/OpenACC.make
@@ -23,8 +23,8 @@ FLAGS_PGI += -ta=multicore
 endif
 
 FLAGS_CRAY = -hstd=c++11
-CFLAGS = $(FLAGS_$(COMPILER))
+CXXFLAGS = $(FLAGS_$(COMPILER))
 
 acc-stream: main.cpp ACCStream.cpp
-	$(CXX) $(CFLAGS) -DACC $^ $(EXTRA_FLAGS) -o $@
+	$(CXX) $(CXXFLAGS) -DACC $^ $(EXTRA_FLAGS) -o $@
 
diff --git a/OpenCL.make b/OpenCL.make
index 4c73b16d..ce7db6e4 100644
--- a/OpenCL.make
+++ b/OpenCL.make
@@ -10,8 +10,8 @@ COMPILER_CRAY = CC
 FLAGS_ = -O3
 FLAGS_GNU = -O3 -std=c++11
 FLAGS_CRAY = -O3 -hstd=c++11
-CFLAGS=$(FLAGS_$(COMPILER))
+CXXFLAGS=$(FLAGS_$(COMPILER))
 
 ocl-stream: main.cpp OCLStream.cpp
-	$(COMPILER_$(COMPILER)) $(CFLAGS) -DOCL $^ $(EXTRA_FLAGS) -lOpenCL -o $@
+	$(COMPILER_$(COMPILER)) $(CXXFLAGS) -DOCL $^ $(EXTRA_FLAGS) -lOpenCL -o $@
 
diff --git a/RAJA.make b/RAJA.make
index 5851e4f6..3f456cbb 100644
--- a/RAJA.make
+++ b/RAJA.make
@@ -6,20 +6,20 @@ endif
 
 ifeq ($(TARGET), CPU)
 COMP=$(CXX)
-CFLAGS = -O3 -std=c++11 -DRAJA_TARGET_CPU 
+CXXFLAGS = -O3 -std=c++11 -DRAJA_TARGET_CPU
 
 ifndef COMPILER
 $(error No COMPILER defined. Specify COMPILER for correct OpenMP flag.)
 endif
 ifeq ($(COMPILER), INTEL)
 COMP = icpc
-CFLAGS += -qopenmp
+CXXFLAGS += -qopenmp
 else ifeq ($(COMPILER), GNU)
 COMP = g++
-CFLAGS += -fopenmp
+CXXFLAGS += -fopenmp
 else ifeq ($(COMPILER), CRAY)
 COMP = CC
-CFLAGS +=
+CXXFLAGS +=
 endif
 
 else ifeq ($(TARGET), GPU)
@@ -28,9 +28,8 @@ COMP = nvcc
 ifndef ARCH
 $(error No ARCH defined. Specify target GPU architecture (e.g. ARCH=sm_35))
 endif
-CFLAGS = --expt-extended-lambda -O3 -std=c++11 -x cu -Xcompiler -fopenmp -arch $(ARCH)
+CXXFLAGS = --expt-extended-lambda -O3 -std=c++11 -x cu -Xcompiler -fopenmp -arch $(ARCH)
 endif
 
 raja-stream: main.cpp RAJAStream.cpp
-	$(COMP) $(CFLAGS) -DUSE_RAJA -I$(RAJA_PATH)/include $^ $(EXTRA_FLAGS) -L$(RAJA_PATH)/lib -lRAJA -o $@
-
+	$(COMP) $(CXXFLAGS) -DUSE_RAJA -I$(RAJA_PATH)/include $^ $(EXTRA_FLAGS) -L$(RAJA_PATH)/lib -lRAJA -o $@