1 files changed, 1 insertions, 1 deletions

diff --git a/src/experimental/cipher.h b/src/experimental/cipher.h
index 91f1704..74f5124 100644
--- a/src/experimental/cipher.h
+++ b/src/experimental/cipher.h
@@ -98,7 +98,7 @@ namespace Bu
 
                 virtual void flush()
                 {
-                        if( iWriteBufFill < iBlockSize )
+                        if( iWriteBufFill > 0 && iWriteBufFill < iBlockSize )
                         {
                                 memset( aWriteBuf+iWriteBufFill, 0, iBlockSize-iWriteBufFill );
                                 encipher( aWriteBuf );