diff --git a/libtransmission/bencode.c b/libtransmission/bencode.c
index bd497ea77..d1f9c7fc6 100644
--- a/libtransmission/bencode.c
+++ b/libtransmission/bencode.c
@@ -377,7 +377,7 @@ benc_val_t * tr_bencDictAdd( benc_val_t * dict, const char * key )
     assert( dict->val.l.count + 2 <= dict->val.l.alloc );
 
     keyval = dict->val.l.vals + dict->val.l.count++;
-    tr_bencInitStr( keyval, key, -1, 1 );
+    tr_bencInitStr( keyval, (char*)key, -1, 1 );
 
     itemval = dict->val.l.vals + dict->val.l.count++;
     tr_bencInit( itemval, TYPE_INT );
diff --git a/libtransmission/peerparse.h b/libtransmission/peerparse.h
index 76189fffb..abac020ac 100644
--- a/libtransmission/peerparse.h
+++ b/libtransmission/peerparse.h
@@ -354,7 +354,7 @@ static int parsePiece( tr_torrent_t * tor, tr_peer_t * peer,
            pieces in our announce data, as it could give us a misleadingly
            bad share ratio . (Ticket #263) */
         const int byteCount = tr_pieceSize( index );
-        if( tor->downloadedCur >= byteCount )
+        if( tor->downloadedCur >= (uint64_t)byteCount )
             tor->downloadedCur -= byteCount;
 
         return ret;
diff --git a/libtransmission/torrent.c b/libtransmission/torrent.c
index c344c9919..9f10d4d61 100644
--- a/libtransmission/torrent.c
+++ b/libtransmission/torrent.c
@@ -707,8 +707,8 @@ fileBytesCompleted ( const tr_torrent_t * tor, int fileIndex )
     assert( (int)firstBlock < tor->blockCount );
     assert( (int)lastBlock < tor->blockCount );
     assert( firstBlock <= lastBlock );
-    assert( TOR_BLOCK_PIECE( tor, firstBlock ) == file->firstPiece );
-    assert( TOR_BLOCK_PIECE( tor, lastBlock ) == file->lastPiece );
+    assert( (int)TOR_BLOCK_PIECE( tor, firstBlock ) == file->firstPiece );
+    assert( (int)TOR_BLOCK_PIECE( tor, lastBlock ) == file->lastPiece );
 
     if( firstBlock == lastBlock )
     {
diff --git a/libtransmission/utils.c b/libtransmission/utils.c
index 7ece232f4..c9a40245c 100644
--- a/libtransmission/utils.c
+++ b/libtransmission/utils.c
@@ -588,8 +588,6 @@ void
 tr_bitfieldAdd( tr_bitfield_t  * bitfield, size_t nth )
 {
     assert( bitfield != NULL );
-    assert( 0 <= nth);
-    assert( 0 <= BIN(nth) );
     assert( BIN(nth) < bitfield->len );
     bitfield->bits[ BIN(nth) ] |= BIT(nth);
 }
@@ -611,7 +609,7 @@ tr_bitfieldRem( tr_bitfield_t   * bitfield,
 {
     if( bitfield != NULL )
     {
-        const int bin = BIN(nth);
+        const size_t bin = BIN(nth);
         assert( bin < bitfield->len );
         bitfield->bits[bin] &= ~BIT(nth);
     }