diff --git a/hqflt/ntsc.c b/hqflt/ntsc.c
index 8c1ca40db9..4e7d63f552 100644
--- a/hqflt/ntsc.c
+++ b/hqflt/ntsc.c
@@ -1,16 +1,19 @@
 #include "ntsc.h"
 #include <stdlib.h>
+#include <stdbool.h>
 
 void ntsc_filter(uint16_t * restrict out, const uint16_t * restrict in, int width, int height)
 {
-   static snes_ntsc_t *ntsc = NULL;
    static int phase = 0;
-   if (ntsc == NULL)
+   static snes_ntsc_t ntsc;
+   static bool inited = false;
+
+   if (inited == false)
    {
-      ntsc = calloc(1, sizeof(snes_ntsc_t));
-      snes_ntsc_init(ntsc, &snes_ntsc_composite);
+      snes_ntsc_init(&ntsc, &snes_ntsc_composite);
+      inited = true;
    }
 
-   snes_ntsc_blit(ntsc, in, width, phase, width, height, out, SNES_NTSC_OUT_WIDTH(width) * sizeof(uint16_t));
-   phase = (phase + 1) % 4;
+   snes_ntsc_blit(&ntsc, in, width, phase, width, height, out, SNES_NTSC_OUT_WIDTH(width) * sizeof(uint16_t));
+   phase ^= 1;
 }