diff --git a/dlls/vbscript/compile.c b/dlls/vbscript/compile.c
index dae8a97c832..6b0e113bef5 100644
--- a/dlls/vbscript/compile.c
+++ b/dlls/vbscript/compile.c
@@ -1571,7 +1571,7 @@ static HRESULT create_function(compile_ctx_t *ctx, function_decl_t *decl, functi
     function_t *func;
     HRESULT hres;
 
-    if(lookup_dim_decls(ctx, decl->name) || lookup_funcs_name(ctx, decl->name) || lookup_const_decls(ctx, decl->name, FALSE)) {
+    if(lookup_dim_decls(ctx, decl->name) || lookup_const_decls(ctx, decl->name, FALSE)) {
         FIXME("%s: redefinition\n", debugstr_w(decl->name));
         return E_FAIL;
     }
@@ -1826,7 +1826,6 @@ static HRESULT check_script_collisions(compile_ctx_t *ctx, script_ctx_t *script)
 {
     class_desc_t *class;
     dynamic_var_t *var;
-    function_t *func;
 
     for(var = ctx->global_vars; var; var = var->next) {
         if(lookup_script_identifier(script, var->name)) {
@@ -1835,13 +1834,6 @@ static HRESULT check_script_collisions(compile_ctx_t *ctx, script_ctx_t *script)
         }
     }
 
-    for(func = ctx->funcs; func; func = func->next) {
-        if(lookup_script_identifier(script, func->name)) {
-            FIXME("%s: redefined\n", debugstr_w(func->name));
-            return E_FAIL;
-        }
-    }
-
     for(class = ctx->classes; class; class = class->next) {
         if(lookup_script_identifier(script, class->name)) {
             FIXME("%s: redefined\n", debugstr_w(class->name));
@@ -1997,8 +1989,18 @@ HRESULT compile_script(script_ctx_t *script, const WCHAR *src, const WCHAR *deli
         script->global_funcs = new_funcs;
         script->global_funcs_size = cnt;
     }
-    for(func_iter = ctx.funcs; func_iter; func_iter = func_iter->next)
-        script->global_funcs[script->global_funcs_cnt++] = func_iter;
+    for(func_iter = ctx.funcs; func_iter; func_iter = func_iter->next) {
+        unsigned i;
+        for(i = 0; i < script->global_funcs_cnt; i++) {
+            if(!wcsicmp(script->global_funcs[i]->name, func_iter->name)) {
+                /* global function already exists, replace it */
+                script->global_funcs[i] = func_iter;
+                break;
+            }
+        }
+        if(i == script->global_funcs_cnt)
+            script->global_funcs[script->global_funcs_cnt++] = func_iter;
+    }
 
     if(ctx.classes) {
         class_desc_t *class = ctx.classes;
diff --git a/dlls/vbscript/tests/lang.vbs b/dlls/vbscript/tests/lang.vbs
index 4623a08e2ba..8a6f0ecd45f 100644
--- a/dlls/vbscript/tests/lang.vbs
+++ b/dlls/vbscript/tests/lang.vbs
@@ -886,6 +886,21 @@ Public Function TestSepFunc(ByVal a) : :
 End Function
 Call ok(TestSepFunc(1) = 1, "Function did not return 1")
 
+ok duplicatedfunc() = 2, "duplicatedfunc = " & duplicatedfunc()
+
+function duplicatedfunc
+    ok false, "duplicatedfunc called"
+end function
+
+sub duplicatedfunc
+    ok false, "duplicatedfunc called"
+end sub
+
+function duplicatedfunc
+    duplicatedfunc = 2
+end function
+
+ok duplicatedfunc() = 2, "duplicatedfunc = " & duplicatedfunc()
 
 ' Stop has an effect only in debugging mode
 Stop
diff --git a/dlls/vbscript/tests/run.c b/dlls/vbscript/tests/run.c
index d3d41a80d2f..9ed1096a4dc 100644
--- a/dlls/vbscript/tests/run.c
+++ b/dlls/vbscript/tests/run.c
@@ -2688,6 +2688,47 @@ static void test_isexpression(void)
     close_script(engine);
 }
 
+static void test_multiple_parse(void)
+{
+    IActiveScriptParse *parser;
+    IActiveScript *script;
+    HRESULT hres;
+
+    script = create_and_init_script(SCRIPTITEM_GLOBALMEMBERS, TRUE);
+
+    hres = IActiveScript_QueryInterface(script, &IID_IActiveScriptParse, (void**)&parser);
+    ok(hres == S_OK, "Could not get IActiveScriptParseProcedure2 iface: %08x\n", hres);
+
+    hres = IActiveScriptParse_ParseScriptText(parser,
+                                              L"function duplicatedfunc\n"
+                                              L"  ok false, \"duplicatedfunc called\"\n"
+                                              L"end function\n",
+                                              NULL, NULL, NULL, 0, 0, 0, NULL, NULL);
+    ok(hres == S_OK, "ParseScriptText failed: %08x\n", hres);
+
+    hres = IActiveScriptParse_ParseScriptText(parser,
+                                              L"sub duplicatedfunc\n"
+                                              L"  ok false, \"duplicatedfunc called\"\n"
+                                              L"end sub\n",
+                                              NULL, NULL, NULL, 0, 0, 0, NULL, NULL);
+    ok(hres == S_OK, "ParseScriptText failed: %08x\n", hres);
+
+    hres = IActiveScriptParse_ParseScriptText(parser,
+                                              L"function duplicatedfunc\n"
+                                              L"  duplicatedfunc = 2\n"
+                                              L"end function\n",
+                                              NULL, NULL, NULL, 0, 0, 0, NULL, NULL);
+    ok(hres == S_OK, "ParseScriptText failed: %08x\n", hres);
+
+    hres = IActiveScriptParse_ParseScriptText(parser,
+                                              L"ok duplicatedfunc() = 2, \"duplicatedfunc = \" & duplicatedfunc()\n",
+                                              NULL, NULL, NULL, 0, 0, 0, NULL, NULL);
+    ok(hres == S_OK, "ParseScriptText failed: %08x\n", hres);
+
+    IActiveScriptParse_Release(parser);
+    close_script(script);
+}
+
 static BSTR get_script_from_file(const char *filename)
 {
     DWORD size, len;
@@ -3037,6 +3078,7 @@ static void run_tests(void)
     test_parse_errors();
     test_parse_context();
     test_callbacks();
+    test_multiple_parse();
 }
 
 static BOOL check_vbscript(void)