diff --git a/debug.c b/debug.c
index f4200b7..abea7b0 100644
--- a/debug.c
+++ b/debug.c
@@ -130,7 +130,7 @@ int main(int argc, char **argv)
 
 	const int width = (0.150 + 3.0 * sync_porch_len) * drate + 20;
 	const int height = 256;
-	img_t *img;
+	img_t *img = 0;
 
 	int hor_ticks = 0;
 	int y_pixel_x = 0;
diff --git a/decode.c b/decode.c
index 24bc9c3..dec3a6d 100644
--- a/decode.c
+++ b/decode.c
@@ -359,7 +359,7 @@ int main(int argc, char **argv)
 
 	short *buff = (short *)malloc(sizeof(short) * channels * factor_M);
 
-	img_t *img;
+	img_t *img = 0;
 
 	for (int out = factor_L;; out++) {
 		if (out >= factor_L) {