diff --git a/src/insexpand.c b/src/insexpand.c
index b49a631..c505158 100644
--- a/src/insexpand.c
+++ b/src/insexpand.c
@@ -642,6 +642,7 @@
 	    // growarray.  Add the character in the next round.
 	    if (ga_grow(&gap, IOSIZE) == FAIL)
 		return (char_u *)"[failed]";
+	    *p = NUL;
 	    STRCPY(gap.ga_data, IObuff);
 	    gap.ga_len = (int)STRLEN(IObuff);
 	}
diff --git a/src/testdir/test_ins_complete.vim b/src/testdir/test_ins_complete.vim
index 2be6d06..7bebc5d 100644
--- a/src/testdir/test_ins_complete.vim
+++ b/src/testdir/test_ins_complete.vim
@@ -2108,6 +2108,13 @@
   exe "normal 2Go\<C-X>\<C-L>\<Esc>"
   call assert_equal(longLine, getline(3))
 
+  " check that the too long text is NUL terminated
+  %del
+  norm o
+  norm 1987ax
+  exec "norm ox\<C-X>\<C-L>"
+  call assert_equal(repeat('x', 1987), getline(3))
+
   bwipe!
   set noic noinfercase
 endfunc
diff --git a/src/version.c b/src/version.c
index b57ab69..b6e61f5 100644
--- a/src/version.c
+++ b/src/version.c
@@ -736,6 +736,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    60,
+/**/
     59,
 /**/
     58,