1 files changed, 2 insertions, 0 deletions
diff --git a/filters.c b/filters.c
index 00e5122..8bb9aa4 100644
--- a/filters.c
+++ b/filters.c
@@ -17,6 +17,7 @@
 */
 
 #include <math.h>
+#include <assert.h>
 
 #include "filters.h"
 
@@ -201,6 +202,7 @@ double flam3_spatial_filter(int knum, double x) {
       return flam3_lanczos2_filter(x)*flam3_sinc(x/2.0);
    else if (knum==13)
       return flam3_quadratic_filter(x);
+   assert (0);
 }
 
 int normalize_vector(double *v, int n) {