diff --git a/src/lib/quantization.cpp b/src/lib/quantization.cpp
index ddd731f..2c669a6 100644
--- a/src/lib/quantization.cpp
+++ b/src/lib/quantization.cpp
@@ -542,7 +542,7 @@ unsigned SfbQuantizer::initQuantMemory (const unsigned maxTransfLength,
 
   if ((m_coeffMagn = (unsigned*) malloc (maxTransfLength * sizeof (unsigned))) == nullptr ||
 #if EC_TRELLIS_OPT_CODING
-      (m_coeffTemp = (uint8_t* ) malloc (maxTransfLength + quantRateLength  )) == nullptr ||
+      (m_coeffTemp = (uint8_t* ) malloc (maxTransfLength + quantRateLength*2)) == nullptr ||
 #endif
       (m_lut2ExpX4 = (double*  ) malloc (numScaleFactors * sizeof (double  ))) == nullptr ||
       (m_lutSfNorm = (double*  ) malloc (numScaleFactors * sizeof (double  ))) == nullptr ||
diff --git a/src/lib/stereoProcessing.h b/src/lib/stereoProcessing.h
index 85d1fe9..7b2215b 100644
--- a/src/lib/stereoProcessing.h
+++ b/src/lib/stereoProcessing.h
@@ -28,10 +28,10 @@ private:
 
   // member variables
 #if SP_SFB_WISE_STEREO
-  int32_t m_originBandMdct1[200]; // i.e. 40 * 5 - NOTE: increase this when maximum grpLength > 5
-  int32_t m_originBandMdct2[200];
-  int32_t m_originBandMdst1[200];
-  int32_t m_originBandMdst2[200];
+  int32_t m_originBandMdct1[320]; // i.e. 64 * 5 - NOTE: increase this when maximum grpLength > 5
+  int32_t m_originBandMdct2[320];
+  int32_t m_originBandMdst1[320];
+  int32_t m_originBandMdst2[320];
 #endif
   uint8_t m_stereoCorrValue[1024 >> SA_BW_SHIFT]; // one value for every 32 spectral coefficients