diff --git a/libtransmission/utils.h b/libtransmission/utils.h
index 9a707c6c9..64e081181 100644
--- a/libtransmission/utils.h
+++ b/libtransmission/utils.h
@@ -85,73 +85,25 @@ uint64_t tr_date( void );
 void tr_wait( uint64_t delay_milliseconds );
 
 #define tr_blockPiece(a) _tr_blockPiece(tor,a)
-static inline int _tr_blockPiece( const tr_torrent_t * tor, int block )
-{
-    const tr_info_t * inf = &tor->info;
-    return block / ( inf->pieceSize / tor->blockSize );
-}
+int _tr_blockPiece( const tr_torrent_t * tor, int block );
 
 #define tr_blockSize(a) _tr_blockSize(tor,a)
-static inline int _tr_blockSize( const tr_torrent_t * tor, int block )
-{
-    const tr_info_t * inf = &tor->info;
-    int dummy;
-
-    if( block != tor->blockCount - 1 ||
-        !( dummy = inf->totalSize % tor->blockSize ) )
-    {
-        return tor->blockSize;
-    }
-
-    return dummy;
-}
+int _tr_blockSize( const tr_torrent_t * tor, int block );
 
 #define tr_blockPosInPiece(a) _tr_blockPosInPiece(tor,a)
-static inline int _tr_blockPosInPiece( const tr_torrent_t * tor, int block )
-{
-    const tr_info_t * inf = &tor->info;
-    return tor->blockSize *
-        ( block % ( inf->pieceSize / tor->blockSize ) );
-}
+int _tr_blockPosInPiece( const tr_torrent_t * tor, int block );
 
 #define tr_pieceCountBlocks(a) _tr_pieceCountBlocks(tor,a)
-static inline int _tr_pieceCountBlocks( const tr_torrent_t * tor, int piece )
-{
-    const tr_info_t * inf = &tor->info;
-    if( piece < inf->pieceCount - 1 ||
-        !( tor->blockCount % ( inf->pieceSize / tor->blockSize ) ) )
-    {
-        return inf->pieceSize / tor->blockSize;
-    }
-    return tor->blockCount % ( inf->pieceSize / tor->blockSize );
-}
+int _tr_pieceCountBlocks( const tr_torrent_t * tor, int piece );
 
 #define tr_pieceStartBlock(a) _tr_pieceStartBlock(tor,a)
-static inline int _tr_pieceStartBlock( const tr_torrent_t * tor, int piece )
-{
-    const tr_info_t * inf = &tor->info;
-    return piece * ( inf->pieceSize / tor->blockSize );
-}
+int _tr_pieceStartBlock( const tr_torrent_t * tor, int piece );
 
 #define tr_pieceSize(a) _tr_pieceSize(tor,a)
-static inline int _tr_pieceSize( const tr_torrent_t * tor, int piece )
-{
-    const tr_info_t * inf = &tor->info;
-    if( piece < inf->pieceCount - 1 ||
-        !( inf->totalSize % inf->pieceSize ) )
-    {
-        return inf->pieceSize;
-    }
-    return inf->totalSize % inf->pieceSize;
-}
+int _tr_pieceSize( const tr_torrent_t * tor, int piece );
 
 #define tr_block(a,b) _tr_block(tor,a,b)
-static inline int _tr_block( const tr_torrent_t * tor, int index, int begin )
-{
-    const tr_info_t * inf = &tor->info;
-    return index * ( inf->pieceSize / tor->blockSize ) +
-        begin / tor->blockSize;
-}
+int _tr_block( const tr_torrent_t * tor, int index, int begin );
 
 /***
 ****