diff --git a/hit.c b/hit.c
index f49827e..f5a50a2 100644
--- a/hit.c
+++ b/hit.c
@@ -55,7 +55,7 @@ mm_reg1_t *mm_gen_regs(void *km, uint32_t hash, int qlen, int n_u, uint64_t *u,
 	mm_reg1_t *r;
 	int i, k;
 
-	if (n_u == 0) return 0;
+	if (n_u <= 0) return 0;
 
 	// sort by score
 	z = (mm128_t*)kmalloc(km, n_u * 16);
diff --git a/main.c b/main.c
index 68a1205..6a9dabc 100644
--- a/main.c
+++ b/main.c
@@ -373,6 +373,7 @@ int main(int argc, char *argv[])
 		fprintf(fp_help, "    --MD         output the MD tag\n");
 		fprintf(fp_help, "    --eqx        write =/X CIGAR operators\n");
 		fprintf(fp_help, "    -Y           use soft clipping for supplementary alignments\n");
+		fprintf(fp_help, "    -y           copy FASTA/Q comments to output SAM\n");
 		fprintf(fp_help, "    -t INT       number of threads [%d]\n", n_threads);
 		fprintf(fp_help, "    -K NUM       minibatch size for mapping [500M]\n");
 //		fprintf(fp_help, "    -v INT       verbose level [%d]\n", mm_verbose);
diff --git a/minimap.h b/minimap.h
index 0389348..b735980 100644
--- a/minimap.h
+++ b/minimap.h
@@ -5,7 +5,7 @@
 #include <stdio.h>
 #include <sys/types.h>
 
-#define MM_VERSION "2.28-r1221-dirty"
+#define MM_VERSION "2.28-r1234-dirty"
 
 #define MM_F_NO_DIAG       (0x001LL) // no exact diagonal hit
 #define MM_F_NO_DUAL       (0x002LL) // skip pairs where query name is lexicographically larger than target name
diff --git a/options.c b/options.c
index 3d5f9a0..d466682 100644
--- a/options.c
+++ b/options.c
@@ -174,8 +174,14 @@ int mm_set_opt(const char *preset, mm_idxopt_t *io, mm_mapopt_t *mo)
 		mo->junc_bonus = 9;
 		mo->junc_pen = 5;
 		mo->zdrop = 200, mo->zdrop_inv = 100; // because mo->a is halved
-		if (strcmp(preset, "splice:hq") == 0)
+		if (strcmp(preset, "splice:hq") == 0) {
 			mo->noncan = 5, mo->b = 4, mo->q = 6, mo->q2 = 24;
+		} else if (strcmp(preset, "splice:sr") == 0) {
+			mo->flag |= MM_F_NO_PRINT_2ND | MM_F_2_IO_THREADS | MM_F_HEAP_SORT;
+			mo->noncan = 5, mo->b = 4, mo->q = 6, mo->q2 = 24;
+			mo->end_bonus = 10;
+			mo->mini_batch_size = 50000000;
+		}
 	} else return -1;
 	return 0;
 }