diff --git a/main.c b/main.c
index 138edca..87540ea 100644
--- a/main.c
+++ b/main.c
@@ -10,7 +10,7 @@
 #include "getopt.h"
 #endif
 
-#define MM_VERSION "2.11-r819-dirty"
+#define MM_VERSION "2.11-r821-dirty"
 
 #ifdef __linux__
 #include <sys/resource.h>
diff --git a/map.c b/map.c
index 636344f..9c99824 100644
--- a/map.c
+++ b/map.c
@@ -601,6 +601,7 @@ static void *worker_pipeline(void *shared, int step, void *in)
 				free(s->reg[i]);
 				free(s->seq[i].seq); free(s->seq[i].name);
 				if (s->seq[i].qual) free(s->seq[i].qual);
+				if (s->seq[i].comment) free(s->seq[i].comment);
 			}
 		}
 		free(s->reg); free(s->n_reg); free(s->seq); // seg_off, n_seg, rep_len and frag_gap were allocated with reg; no memory leak here