diff --git a/format.c b/format.c
index c3d2b7e..061103b 100644
--- a/format.c
+++ b/format.c
@@ -300,7 +300,7 @@ void mm_write_sam2(kstring_t *s, const mm_idx_t *mi, const mm_bseq1_t *t, int se
 	if (r == 0) {
 		if (r_prev) {
 			this_rid = r_prev->rid, this_pos = r_prev->rs;
-			mm_sprintf_lite(s, "\t%s\t%d\t0\t*", mi->seq[this_rid].name, this_pos);
+			mm_sprintf_lite(s, "\t%s\t%d\t0\t*", mi->seq[this_rid].name, this_pos+1);
 		} else mm_sprintf_lite(s, "\t*\t0\t0\t*");
 	} else {
 		this_rid = r->rid, this_pos = r->rs, this_rev = r->rev;
diff --git a/main.c b/main.c
index 3ffe6e8..d1619b7 100644
--- a/main.c
+++ b/main.c
@@ -6,7 +6,7 @@
 #include "mmpriv.h"
 #include "getopt.h"
 
-#define MM_VERSION "2.2-r508-dirty"
+#define MM_VERSION "2.2-r510-dirty"
 
 #ifdef __linux__
 #include <sys/resource.h>