diff --git a/lib/decompress_bunzip2.c b/lib/decompress_bunzip2.c
index 1288f146661f..aaa75404250e 100644
--- a/lib/decompress_bunzip2.c
+++ b/lib/decompress_bunzip2.c
@@ -439,7 +439,7 @@ static int INIT get_next_block(struct bunzip_data *bd)
 		   array.) */
 		if (runPos) {
 			runPos = 0;
-			if (dbufCount+t >= dbufSize)
+			if (dbufCount+t > dbufSize)
 				return RETVAL_DATA_ERROR;
 
 			uc = symToByte[mtfSymbol[0]];