diff --git a/src/Makefile b/src/Makefile
index c32ea08..b110f91 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -696,7 +696,8 @@
 # More at: https://code.google.com/p/address-sanitizer/
 # Useful environment variables:
 # $ export ASAN_OPTIONS="print_stacktrace=1 log_path=asan"
-# $ export LSAN_OPTIONS="suppressions=$cwd/testdir/lsan-suppress.txt"
+# $ export LSAN_OPTIONS="suppressions=`pwd`/testdir/lsan-suppress.txt"
+# When running tests output can be found in testdir/asan.*
 #SANITIZER_CFLAGS = -g -O0 -fsanitize=address -fno-omit-frame-pointer
 #SANITIZER_CFLAGS = -g -O0 -fsanitize=undefined -fno-omit-frame-pointer
 SANITIZER_LIBS = $(SANITIZER_CFLAGS)
diff --git a/src/testdir/Makefile b/src/testdir/Makefile
index 92506e6..7f9ef04 100644
--- a/src/testdir/Makefile
+++ b/src/testdir/Makefile
@@ -100,6 +100,7 @@
 	-rm -f opt_test.vim test.log test_result.log messages
 	-rm -f $(RM_ON_RUN) $(RM_ON_START)
 	-rm -f valgrind.*
+	-rm -f asan.*
 
 test1.out: test1.in
 	-rm -rf $*.failed $(RM_ON_RUN) $(RM_ON_START) wrongtermsize
diff --git a/src/version.c b/src/version.c
index a46ffb4..e446e6b 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    621,
+/**/
     620,
 /**/
     619,