diff --git a/pipi/codec/oric.c b/pipi/codec/oric.c
index ba790c3..e6df6c4 100644
--- a/pipi/codec/oric.c
+++ b/pipi/codec/oric.c
@@ -529,11 +529,11 @@ static void write_screen(float const *data, uint8_t *screen)
 
     stride = (WIDTH + 1) * 3;
 
-    src = malloc((WIDTH + 1) * (HEIGHT + 1) * 3);
-    memset(src, 0, (WIDTH + 1) * (HEIGHT + 1) * 3);
+    src = malloc((WIDTH + 1) * (HEIGHT + 1) * 3 * sizeof(int));
+    memset(src, 0, (WIDTH + 1) * (HEIGHT + 1) * 3 * sizeof(int));
 
-    dst = malloc((WIDTH + 1) * (HEIGHT + 1) * 3);
-    memset(dst, 0, (WIDTH + 1) * (HEIGHT + 1) * 3);
+    dst = malloc((WIDTH + 1) * (HEIGHT + 1) * 3 * sizeof(int));
+    memset(dst, 0, (WIDTH + 1) * (HEIGHT + 1) * 3 * sizeof(int));
 
     /* Import pixels into our custom format */
     for(y = 0; y < HEIGHT; y++)