diff --git a/iguana/iguana_blocks.c b/iguana/iguana_blocks.c
index ff9b7876b..6c24e88cf 100755
--- a/iguana/iguana_blocks.c
+++ b/iguana/iguana_blocks.c
@@ -284,7 +284,7 @@ int32_t iguana_blocksizecheck(char *debugstr,uint8_t zcash,struct iguana_block *
     int32_t bsize = zcash != 0 ? sizeof(struct iguana_zblock) : sizeof(struct iguana_block);
     if ( block->RO.allocsize != bsize )
     {
-        if ( block->RO.allocsize == 0 || block->RO.allocsize < bsize )
+        if ( block->RO.allocsize == 0 || block->RO.allocsize != bsize )
         {
             //printf("%s block validate warning: mismatched size %d vs %d\n",debugstr,block->RO.allocsize,bsize);
             block->RO.allocsize = bsize;