diff --git a/chain.c b/chain.c
index d8c1eae..f7c05cd 100644
--- a/chain.c
+++ b/chain.c
@@ -28,7 +28,10 @@ mm128_t *mm_chain_dp(int max_dist_x, int max_dist_y, int bw, int max_skip, int m
 	mm128_t *b, *w;
 
 	if (_u) *_u = 0, *n_u_ = 0;
-	if (n == 0 || a == 0) return 0;
+	if (n == 0 || a == 0) {
+		kfree(km, a);
+		return 0;
+	}
 	f = (int32_t*)kmalloc(km, n * 4);
 	p = (int32_t*)kmalloc(km, n * 4);
 	t = (int32_t*)kmalloc(km, n * 4);
diff --git a/main.c b/main.c
index 970884e..fac05b1 100644
--- a/main.c
+++ b/main.c
@@ -6,7 +6,7 @@
 #include "mmpriv.h"
 #include "ketopt.h"
 
-#define MM_VERSION "2.15-r914-dirty"
+#define MM_VERSION "2.15-r915-dirty"
 
 #ifdef __linux__
 #include <sys/resource.h>