diff --git a/src/cnn/make.c b/src/cnn/make.c
index b403d3c..9f1016e 100644
--- a/src/cnn/make.c
+++ b/src/cnn/make.c
@@ -8,18 +8,18 @@
 void make_average_pooling(float*** input, float*** output, int size, int output_depth, int output_dim) {
     // input[output_depth][output_dim+size-1][output_dim+size-1]
     // output[output_depth][output_dim][output_dim]
-    float average;
+    float sum;
     int n = size*size;
     for (int i=0; i < output_depth; i++) {
         for (int j=0; j < output_dim; j++) {
             for (int k=0; k < output_dim; k++) {
-                average = 0.;
+                sum = 0.;
                 for (int a=0; a < size; a++) {
                     for (int b=0; b < size; b++) {
-                        average += input[i][size*j +a][size*k +b];
+                        sum += input[i][size*j +a][size*k +b];
                     }
                 }
-                output[i][j][k] = average/(float)n;
+                output[i][j][k] = sum/(float)n;
             }
         }
     }