diff --git a/src/os_unix.c b/src/os_unix.c
index bd7b219..0e27609 100644
--- a/src/os_unix.c
+++ b/src/os_unix.c
@@ -8032,7 +8032,7 @@
 	    &smcallbacks,
 	    NULL,
 	    &xsmp.clientid,
-	    sizeof(errorstring),
+	    sizeof(errorstring) - 1,
 	    errorstring);
     if (xsmp.smcconn == NULL)
     {
diff --git a/src/testdir/test_startup.vim b/src/testdir/test_startup.vim
index 4a296ec..6f06ab8 100644
--- a/src/testdir/test_startup.vim
+++ b/src/testdir/test_startup.vim
@@ -272,7 +272,7 @@
 " Test the -V[N]{filename} argument to set the 'verbose' option to N
 " and set 'verbosefile' to filename.
 func Test_V_file_arg()
-  if RunVim([], [], ' --clean -X -V2Xverbosefile -c "set verbose? verbosefile?" -cq')
+  if RunVim([], [], ' --clean -V2Xverbosefile -c "set verbose? verbosefile?" -cq')
     let out = join(readfile('Xverbosefile'), "\n")
     call assert_match("sourcing \"$VIMRUNTIME[\\/]defaults\.vim\"\n", out)
     call assert_match("\n  verbose=2\n", out)
diff --git a/src/version.c b/src/version.c
index 22cc075..480c1ab 100644
--- a/src/version.c
+++ b/src/version.c
@@ -795,6 +795,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    426,
+/**/
     425,
 /**/
     424,