diff --git a/src/x.c b/src/x.c
index 79719b3..ed6668a 100644
--- a/src/x.c
+++ b/src/x.c
@@ -547,6 +547,9 @@ void x_create_convolution_kernel(const conv *kernel, double center,
 
 	double sum = center;
 	for (int i = 0; i < kernel->w * kernel->h; i++) {
+		if (i == kernel->w * kernel->h / 2) {
+			continue;
+		}
 		sum += kernel->data[i];
 	}