diff --git a/src/blas.h b/src/blas.h
index 707291dead0..c3d9bc2351a 100644
--- a/src/blas.h
+++ b/src/blas.h
@@ -28,7 +28,7 @@ void variance_cpu(float *x, float *mean, int batch, int filters, int spatial, fl
 void scale_bias(float *output, float *scales, int batch, int n, int size);
 void backward_scale_cpu(float *x_norm, float *delta, int batch, int n, int size, float *scale_updates);
 void mean_delta_cpu(float *delta, float *variance, int batch, int filters, int spatial, float *mean_delta);
-void  variance_delta_cpu(float *x, float *delta, float *mean, float *variance, int batch, int filters, int spatial, float *variance_delta);
+void variance_delta_cpu(float *x, float *delta, float *mean, float *variance, int batch, int filters, int spatial, float *variance_delta);
 void normalize_delta_cpu(float *x, float *mean, float *variance, float *mean_delta, float *variance_delta, int batch, int filters, int spatial, float *delta);
 void l2normalize_cpu(float *x, float *dx, int batch, int filters, int spatial);