diff --git a/src/evalfunc.c b/src/evalfunc.c
index 4c02e15..5631795 100644
--- a/src/evalfunc.c
+++ b/src/evalfunc.c
@@ -13199,7 +13199,8 @@
 	case 16: what = STR2NR_HEX + STR2NR_FORCE; break;
 	default: what = 0;
     }
-    vim_str2nr(p, NULL, NULL, what, &n, NULL, 0);
+    vim_str2nr(p, NULL, NULL, what, &n, NULL, 0, FALSE);
+    // Text after the number is silently ignored.
     if (isneg)
 	rettv->vval.v_number = -n;
     else