diff --git a/Makefile b/Makefile
index 0797d8d..ce8f7b7 100644
--- a/Makefile
+++ b/Makefile
@@ -68,7 +68,7 @@ cnn: $(BUILDDIR)/cnn-main;
 $(BUILDDIR)/cnn-main: $(CNN_SRCDIR)/main.c $(BUILDDIR)/cnn_train.o $(BUILDDIR)/cnn_cnn.o $(BUILDDIR)/cnn_creation.o $(BUILDDIR)/cnn_initialisation.o $(BUILDDIR)/cnn_make.o $(BUILDDIR)/cnn_neuron_io.o $(BUILDDIR)/cnn_function.o  $(BUILDDIR)/cnn_utils.o $(BUILDDIR)/cnn_free.o $(BUILDDIR)/cnn_convolution.o $(BUILDDIR)/colors.o $(BUILDDIR)/mnist.o
 	$(CC)  $(CFLAGS)  $^ -o $@
 
-$(BUILDDIR)/cnn-main-cuda: $(CNN_SRCDIR)/main.c $(BUILDDIR)/cnn_train.o $(BUILDDIR)/cnn_cnn.o $(BUILDDIR)/cnn_creation.o $(BUILDDIR)/cnn_initialisation.o $(BUILDDIR)/cnn_make.o $(BUILDDIR)/cnn_neuron_io.o $(BUILDDIR)/cnn_function.o  $(BUILDDIR)/cnn_utils.o $(BUILDDIR)/cnn_free.o $(BUILDDIR)/cnn_cuda_convolution.o $(BUILDDIR)/colors.o $(BUILDDIR)/mnist.o
+$(BUILDDIR)/cnn-main-cuda: $(BUILDDIR)/cnn_main.o $(BUILDDIR)/cnn_train.o $(BUILDDIR)/cnn_cnn.o $(BUILDDIR)/cnn_creation.o $(BUILDDIR)/cnn_initialisation.o $(BUILDDIR)/cnn_make.o $(BUILDDIR)/cnn_neuron_io.o $(BUILDDIR)/cnn_function.o  $(BUILDDIR)/cnn_utils.o $(BUILDDIR)/cnn_free.o $(BUILDDIR)/cnn_cuda_convolution.o $(BUILDDIR)/colors.o $(BUILDDIR)/mnist.o
 	$(NVCC)  $(NVCCFLAGS)  $^ -o $@
 
 $(BUILDDIR)/cnn_%.o: $(CNN_SRCDIR)/%.c $(CNN_SRCDIR)/include/%.h
@@ -107,7 +107,7 @@ build/test-cnn_%: test/cnn_%.c $(CNN_OBJ) $(BUILDDIR)/colors.o $(BUILDDIR)/mnist
 build/test-mnist_%: test/mnist_%.c $(MNIST_OBJ) $(BUILDDIR)/colors.o
 	$(CC)  $(CFLAGS)  $^ -o $@
 
-$(BUILDDIR)/test-cnn_%: test/cnn_%.cu $(BUILDDIR)/cnn_cuda_%.o $(BUILDDIR)/colors.o $(BUILDDIR)/mnist.o $(CNN_OBJ)
+$(BUILDDIR)/test-cnn_%: test/cnn_%.cu $(BUILDDIR)/cnn_cuda_%.o $(BUILDDIR)/colors.o $(BUILDDIR)/mnist.o
 ifndef NVCC_INSTALLED
 	@echo "nvcc not found, skipping"
 else
diff --git a/src/cnn/convolution.cu b/src/cnn/convolution.cu
index 5605590..7ee2839 100644
--- a/src/cnn/convolution.cu
+++ b/src/cnn/convolution.cu
@@ -147,6 +147,7 @@ void make_convolution_device(Kernel_cnn* kernel, float*** input, float*** output
 }
 #endif
 
+extern "C" {
 
 void make_convolution(Kernel_cnn* kernel, float*** input, float*** output, int output_dim) {
     #ifndef __CUDACC__
@@ -154,4 +155,6 @@ void make_convolution(Kernel_cnn* kernel, float*** input, float*** output, int o
     #else
     make_convolution_device(kernel, input, output, output_dim);
     #endif
+}
+
 }
\ No newline at end of file
diff --git a/test/cnn_convolution.cu b/test/cnn_convolution.cu
index eccee08..f092431 100644
--- a/test/cnn_convolution.cu
+++ b/test/cnn_convolution.cu
@@ -5,7 +5,6 @@
 #include <math.h>
 #include <time.h>
 
-#include "../src/cnn/include/make.h"
 #include "../src/cnn/include/convolution.h"
 #include "../src/cnn/include/struct.h"