diff --git a/src/ext/libcharsetdetect/mozilla/extensions/universalchardet/src/base/nsSBCSGroupProber.cpp b/src/ext/libcharsetdetect/mozilla/extensions/universalchardet/src/base/nsSBCSGroupProber.cpp
index f97a427..e5b6ba6 100644
--- a/src/ext/libcharsetdetect/mozilla/extensions/universalchardet/src/base/nsSBCSGroupProber.cpp
+++ b/src/ext/libcharsetdetect/mozilla/extensions/universalchardet/src/base/nsSBCSGroupProber.cpp
@@ -182,6 +182,7 @@ nsProbingState nsSBCSGroupProber::HandleData(const char* aBuf, PRUint32 aLen)
 
 done:
   PR_FREEIF(newBuf1);
+  PR_FREEIF(newBuf2);
 
   return mState;
 }