diff --git a/archival/libarchive/decompress_bunzip2.c b/archival/libarchive/decompress_bunzip2.c
index 78366f2..1f535b3 100644
--- a/archival/libarchive/decompress_bunzip2.c
+++ b/archival/libarchive/decompress_bunzip2.c
@@ -235,9 +235,9 @@
 		/* Get next value */
 		int n = 0;
 		while (get_bits(bd, 1)) {
+			n++;
 			if (n >= groupCount)
 				return RETVAL_DATA_ERROR;
-			n++;
 		}
 		/* Decode MTF to get the next selector */
 		tmp_byte = mtfSymbol[n];