diff --git a/libmpcodecs/img_format.c b/libmpcodecs/img_format.c
index e4c9309229..ae6f83669d 100644
--- a/libmpcodecs/img_format.c
+++ b/libmpcodecs/img_format.c
@@ -22,6 +22,7 @@ char *vo_format_name(int format)
 	case IMGFMT_CLPL: return("Planar CLPL");
 	case IMGFMT_Y800: return("Planar Y800");
 	case IMGFMT_Y8: return("Planar Y8");
+	case IMGFMT_NV12: return("Planar NV12");
 	case IMGFMT_IUYV: return("Packed IUYV");
 	case IMGFMT_IY41: return("Packed IY41");
 	case IMGFMT_IYU1: return("Packed IYU1");
diff --git a/libmpcodecs/img_format.h b/libmpcodecs/img_format.h
index 6dd00a2060..321b9c3c37 100644
--- a/libmpcodecs/img_format.h
+++ b/libmpcodecs/img_format.h
@@ -37,6 +37,7 @@
 #define IMGFMT_CLPL 0x4C504C43
 #define IMGFMT_Y800 0x30303859
 #define IMGFMT_Y8   0x20203859
+#define IMGFMT_NV12 0x3231564E
 
 /* Packed YUV Formats */