diff --git a/main.c b/main.c
index 680d35f..4e1f897 100644
--- a/main.c
+++ b/main.c
@@ -8,7 +8,7 @@
 #include "minimap.h"
 #include "mmpriv.h"
 
-#define MM_VERSION "2.0rc1-r273-dirty"
+#define MM_VERSION "2.0rc1-r274-dirty"
 
 void liftrlimit()
 {
@@ -54,7 +54,7 @@ int main(int argc, char *argv[])
 	mm_realtime0 = realtime();
 	mm_mapopt_init(&opt);
 
-	while ((c = getopt_long(argc, argv, "aSw:k:K:t:r:f:Vv:g:I:d:XT:s:x:Hcp:M:n:z:A:B:O:E:m:N:Q", long_options, &long_idx)) >= 0) {
+	while ((c = getopt_long(argc, argv, "aSw:k:K:t:r:f:Vv:g:G:I:d:XT:s:x:Hcp:M:n:z:A:B:O:E:m:N:Q", long_options, &long_idx)) >= 0) {
 		if (c == 'w') w = atoi(optarg), idx_par_set = 1;
 		else if (c == 'k') k = atoi(optarg), idx_par_set = 1;
 		else if (c == 'H') is_hpc = 1, idx_par_set = 1;
@@ -64,6 +64,7 @@ int main(int argc, char *argv[])
 		else if (c == 't') n_threads = atoi(optarg);
 		else if (c == 'v') mm_verbose = atoi(optarg);
 		else if (c == 'g') opt.max_gap = atoi(optarg);
+		else if (c == 'G') opt.max_gap_ref = atoi(optarg);
 		else if (c == 'N') opt.best_n = atoi(optarg);
 		else if (c == 'p') opt.pri_ratio = atof(optarg);
 		else if (c == 'M') opt.mask_level = atof(optarg);