diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c
index af40f0da3a95..bcdd9f25b2f5 100644
--- a/fs/ocfs2/alloc.c
+++ b/fs/ocfs2/alloc.c
@@ -7546,7 +7546,7 @@ int ocfs2_trim_mainbm(struct super_block *sb, struct fstrim_range *range)
 	len = range->len >> osb->s_clustersize_bits;
 	minlen = range->minlen >> osb->s_clustersize_bits;
 
-	if (minlen >= osb->bitmap_cpg || range->len < sb->s_blocksize)
+	if (minlen >= osb->bitmap_cpg || range->len < osb->s_clustersize)
 		return -EINVAL;
 
 	trace_ocfs2_trim_mainbm(start, len, minlen);