diff --git a/av1/encoder/av1_quantize.c b/av1/encoder/av1_quantize.c
index 21ab4db..a7baaf8 100644
--- a/av1/encoder/av1_quantize.c
+++ b/av1/encoder/av1_quantize.c
@@ -289,10 +289,13 @@
                        sc->iscan);
         break;
       case 1:
-        aom_quantize_b_32x32(coeff_ptr, n_coeffs, p->zbin_QTX, p->round_QTX,
-                             p->quant_QTX, p->quant_shift_QTX, qcoeff_ptr,
-                             dqcoeff_ptr, p->dequant_QTX, eob_ptr, sc->scan,
-                             sc->iscan);
+        // TODO(any): there is a bug in current ssse3 and avx optimizations
+        // (refer to libaom issue 2240), which needs to be fixed. Use c version
+        // for now.
+        aom_quantize_b_32x32_c(coeff_ptr, n_coeffs, p->zbin_QTX, p->round_QTX,
+                               p->quant_QTX, p->quant_shift_QTX, qcoeff_ptr,
+                               dqcoeff_ptr, p->dequant_QTX, eob_ptr, sc->scan,
+                               sc->iscan);
         break;
       case 2:
         aom_quantize_b_64x64(coeff_ptr, n_coeffs, p->zbin_QTX, p->round_QTX,