diff --git a/src/job.c b/src/job.c
index 4e64ca3..2a2e531 100644
--- a/src/job.c
+++ b/src/job.c
@@ -272,7 +272,8 @@
 		*lp = tv_get_number(item);
 		if (*lp < 0)
 		{
-		    semsg(_(e_invalid_value_for_argument_str_str), hi->hi_key, tv_get_string(item));
+		    semsg(_(e_invalid_value_for_argument_str_str),
+					      hi->hi_key, tv_get_string(item));
 		    return FAIL;
 		}
 	    }
@@ -444,10 +445,19 @@
 	    }
 	    else if (STRCMP(hi->hi_key, "term_cols") == 0)
 	    {
+		int error = FALSE;
+
 		if (!(supported2 & JO2_TERM_COLS))
 		    break;
 		opt->jo_set2 |= JO2_TERM_COLS;
-		opt->jo_term_cols = tv_get_number(item);
+		opt->jo_term_cols = tv_get_number_chk(item, &error);
+		if (error)
+		    return FAIL;
+		if (opt->jo_term_cols < 0 || opt->jo_term_cols > 1000)
+		{
+		    semsg(_(e_invalid_value_for_argument_str), "term_cols");
+		    return FAIL;
+		}
 	    }
 	    else if (STRCMP(hi->hi_key, "vertical") == 0)
 	    {
diff --git a/src/testdir/test_terminal.vim b/src/testdir/test_terminal.vim
index 596ae5d..da263f4 100644
--- a/src/testdir/test_terminal.vim
+++ b/src/testdir/test_terminal.vim
@@ -617,6 +617,10 @@
   call assert_fails("call term_start(cmd, {'term_rows': 1001})", 'E475:')
   call assert_fails("call term_start(cmd, {'term_rows': 10.0})", 'E805:')
 
+  call assert_fails("call term_start(cmd, {'term_cols': -1})", 'E475:')
+  call assert_fails("call term_start(cmd, {'term_cols': 1001})", 'E475:')
+  call assert_fails("call term_start(cmd, {'term_cols': 10.0})", 'E805:')
+
   call delete('Xtext')
 endfunc
 
diff --git a/src/version.c b/src/version.c
index ce64da4..e6d2713 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1527,
+/**/
     1526,
 /**/
     1525,