diff --git a/Fonderie/single.c b/Fonderie/single.c
index db1d456c..0e7696a6 100644
--- a/Fonderie/single.c
+++ b/Fonderie/single.c
@@ -61,7 +61,7 @@ int single_push_picture(FloatImg *pimg)
 {
 int		foo;
 char		line[1000], buff[100];
-char		*extension = ".png";
+char		*extension = "png";
 
 #if DEBUG_LEVEL
 fprintf(stderr, ">>> %s ( %p )\n", __func__, pimg);