diff --git a/bwamem.c b/bwamem.c
index d29fcae..0f400b0 100644
--- a/bwamem.c
+++ b/bwamem.c
@@ -376,7 +376,7 @@ int mem_patch_reg(const mem_opt_t *opt, const bntseq_t *bns, const uint8_t *pac,
 	if (bwa_verbose >= 4)
 		printf("* potential hit merge between [%d,%d)<=>[%ld,%ld) and [%d,%d)<=>[%ld,%ld), @ %s; w=%d, r=%.4g\n",
 			   a->qb, a->qe, (long)a->rb, (long)a->re, b->qb, b->qe, (long)b->rb, (long)b->re, bns->anns[a->rid].name, w, r);
-	if (w > opt->w) return 0; // the bandwidth is too large
+	if (w > opt->w<<1) return 0; // the bandwidth is too large
 	if (r >= PATCH_MAX_R_BW) return 0; // relative bandwidth is too large
 	// global alignment
 	w += a->w + b->w;
diff --git a/fastmap.c b/fastmap.c
index 2810a36..655272d 100644
--- a/fastmap.c
+++ b/fastmap.c
@@ -147,8 +147,8 @@ int main_mem(int argc, char *argv[])
 		fprintf(stderr, "       -L INT[,INT]  penalty for 5'- and 3'-end clipping [%d,%d]\n", opt->pen_clip5, opt->pen_clip3);
 		fprintf(stderr, "       -U INT        penalty for an unpaired read pair [%d]\n", opt->pen_unpaired);
 		fprintf(stderr, "       -x STR        read type. Setting -x changes multiple parameters unless overriden [null]\n");
-		fprintf(stderr, "                     pacbio: -k17 -W40 -w200 -c1000 -r10 -A2 -B5 -O2 -E1 -L0\n");
-		fprintf(stderr, "                     pbread: -k13 -W40 -w200 -c1000 -r10 -A2 -B5 -O2 -E1 -N25 -FeaD.001\n");
+		fprintf(stderr, "                     pacbio: -k17 -W40 -c1000 -r10 -A2 -B5 -O2 -E1 -L0\n");
+		fprintf(stderr, "                     pbread: -k13 -W40 -c1000 -r10 -A2 -B5 -O2 -E1 -N25 -FeaD.001\n");
 		fprintf(stderr, "\nInput/output options:\n\n");
 		fprintf(stderr, "       -p            first query file consists of interleaved paired-end sequences\n");
 		fprintf(stderr, "       -R STR        read group header line such as '@RG\\tID:foo\\tSM:bar' [null]\n");
@@ -178,7 +178,6 @@ int main_mem(int argc, char *argv[])
 			if (!opt0.o_ins) opt->o_ins = 2;
 			if (!opt0.e_ins) opt->e_ins = 1;
 			if (!opt0.b) opt->b = 5;
-			if (!opt0.w) opt->w = 200;
 			if (!opt0.max_occ) opt->max_occ = 1000;
 			if (opt0.split_factor == 0.) opt->split_factor = 10.;
 			if (!opt0.min_chain_weight) opt->min_chain_weight = 40;
diff --git a/main.c b/main.c
index 23d067d..edc129c 100644
--- a/main.c
+++ b/main.c
@@ -4,7 +4,7 @@
 #include "utils.h"
 
 #ifndef PACKAGE_VERSION
-#define PACKAGE_VERSION "0.7.8-r728-dirty"
+#define PACKAGE_VERSION "0.7.8-r729-dirty"
 #endif
 
 int bwa_fa2pac(int argc, char *argv[]);