diff --git a/picojpeg.c b/picojpeg.c
index 2fae2a9..6cba8a5 100644
--- a/picojpeg.c
+++ b/picojpeg.c
@@ -642,8 +642,9 @@ static uint8 readSOFMarker(void)
       gCompVSamp[i] = (uint8)getBits1(4);
       gCompQuant[i] = (uint8)getBits1(8);
       
-      if (gCompQuant[i] > 1)
+      if (i < 2 && gCompQuant[i] > 1) {
          return PJPG_UNSUPPORTED_QUANT_TABLE;
+      }
    }
    
    return 0;