diff --git a/Fonderie/glitches.c b/Fonderie/glitches.c
index 3781428..b7f9005 100644
--- a/Fonderie/glitches.c
+++ b/Fonderie/glitches.c
@@ -113,4 +113,10 @@ int poke_a_random_pixel(FloatImg *picz, float fval, int kaboo)
 return -1;
 }
 /*   --------------------------------------------------------------   */
+int vertical_singlitch(FloatImg *picz, float omega, float phi)
+{
+
+return -1;
+}
+/*   --------------------------------------------------------------   */
 
diff --git a/Fonderie/glitches.h b/Fonderie/glitches.h
index a1cd77f..740cf35 100644
--- a/Fonderie/glitches.h
+++ b/Fonderie/glitches.h
@@ -9,4 +9,6 @@ int un_petit_flou_8x8(FloatImg *picture, int x, int y);
 int un_moyen_flou_8x8(FloatImg *picture, int x, int y);
 int poke_a_random_pixel(FloatImg *picz, float fval, int kaboo);
 
+int vertical_singlitch(FloatImg *picz, float omega, float phi);
+
 /* this is a wtf file */