diff --git a/src/evalvars.c b/src/evalvars.c
index d95118b..22d39a7 100644
--- a/src/evalvars.c
+++ b/src/evalvars.c
@@ -909,7 +909,7 @@
 }
 
 /*
- * Assign the typevalue "tv" to the variable or variables at "arg_start".
+ * Assign the typeval "tv" to the variable or variables at "arg_start".
  * Handles both "var" with any type and "[var, var; var]" with a list type.
  * When "op" is not NULL it points to a string with characters that
  * must appear after the variable(s).  Use "+", "-" or "." for add, subtract
@@ -3179,6 +3179,7 @@
 
     if (di != NULL)
     {
+	// Item already exists.  Allowed to replace when reloading.
 	if ((di->di_flags & DI_FLAGS_RELOAD) == 0)
 	{
 	    if (flags & (ASSIGN_CONST | ASSIGN_FINAL))
@@ -3269,6 +3270,14 @@
     }
     else
     {
+	// Item not found, check if a function already exists.
+	if (is_script_local && (flags & (ASSIGN_NO_DECL | ASSIGN_DECL)) == 0
+			  && lookup_scriptitem(name, STRLEN(name), NULL) == OK)
+	{
+	    semsg(_(e_redefining_script_item_str), name);
+	    goto failed;
+	}
+
 	// add a new variable
 	if (vim9script && is_script_local && (flags & ASSIGN_NO_DECL))
 	{
diff --git a/src/testdir/test_vim9_script.vim b/src/testdir/test_vim9_script.vim
index 5d1e401..2743668 100644
--- a/src/testdir/test_vim9_script.vim
+++ b/src/testdir/test_vim9_script.vim
@@ -1515,6 +1515,17 @@
   delete('Xreload.vim')
 enddef
 
+def Test_script_var_shadows_function()
+  var lines =<< trim END
+      vim9script
+      def Func(): number
+        return 123
+      enddef
+      var Func = 1
+  END
+  CheckScriptFailure(lines, 'E1041:', 5)
+enddef
+
 def s:RetSome(): string
   return 'some'
 enddef
diff --git a/src/version.c b/src/version.c
index c6913d6..879931d 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2567,
+/**/
     2566,
 /**/
     2565,