diff --git a/src/nvim/eval/funcs.c b/src/nvim/eval/funcs.c
index d2114ed3c4..e7b0e2bd7b 100644
--- a/src/nvim/eval/funcs.c
+++ b/src/nvim/eval/funcs.c
@@ -2813,7 +2813,7 @@ static void f_has(typval_T *argvars, typval_T *rettv, EvalFuncData fptr)
                  && (minor < VIM_VERSION_MINOR
                      || (minor == VIM_VERSION_MINOR
                          && has_vim_patch(atoi(name + 10))))));
-      } else {
+      } else if (ascii_isdigit(name[5])) {
         n = has_vim_patch(atoi(name + 5));
       }
     } else if (STRNICMP(name, "nvim-", 5) == 0) {
diff --git a/test/old/testdir/test_expr.vim b/test/old/testdir/test_expr.vim
index 81023ef92f..c62dc9845d 100644
--- a/test/old/testdir/test_expr.vim
+++ b/test/old/testdir/test_expr.vim
@@ -43,6 +43,7 @@ func Test_version()
   call assert_false(has('patch-7.4.'))
   call assert_false(has('patch-9.1.0'))
   call assert_false(has('patch-9.9.1'))
+  call assert_false(has('patch-abc'))
 endfunc
 
 func Test_op_ternary()