diff --git a/modules/rostests/winetests/reg/delete.c b/modules/rostests/winetests/reg/delete.c
index fff3c5348b8..ee2257d42c5 100644
--- a/modules/rostests/winetests/reg/delete.c
+++ b/modules/rostests/winetests/reg/delete.c
@@ -100,6 +100,22 @@ static void test_delete(void)
     ok(r == REG_EXIT_SUCCESS, "got exit code %d, expected 0\n", r);
     verify_reg_nonexist(hkey, "\\foo\\bar");
 
+    add_value(hkey, "string\\01", REG_SZ, "Value", 6);
+    add_value(hkey, "string2", REG_SZ, "foo\\0bar", 9);
+    add_value(hkey, "\\0", REG_SZ, "Value", 6);
+
+    run_reg_exe("reg delete HKCU\\" KEY_BASE " /v string\\01 /f", &r);
+    ok(r == REG_EXIT_SUCCESS, "got exit code %d, expected 0\n", r);
+    verify_reg_nonexist(hkey, "string\\01");
+
+    run_reg_exe("reg delete HKCU\\" KEY_BASE " /v string2 /f", &r);
+    ok(r == REG_EXIT_SUCCESS, "got exit code %d, expected 0\n", r);
+    verify_reg_nonexist(hkey, "string2");
+
+    run_reg_exe("reg delete HKCU\\" KEY_BASE " /v \\0 /f", &r);
+    ok(r == REG_EXIT_SUCCESS, "got exit code %d, expected 0\n", r);
+    verify_reg_nonexist(hkey, "\\0");
+
     close_key(hkey);
 
     run_reg_exe("reg delete HKCU\\" KEY_BASE " /f", &r);
diff --git a/sdk/tools/winesync/reg.cfg b/sdk/tools/winesync/reg.cfg
index defe914403c..98463213ef7 100644
--- a/sdk/tools/winesync/reg.cfg
+++ b/sdk/tools/winesync/reg.cfg
@@ -4,4 +4,4 @@ directories:
 files:
   programs/reg/resource.h: base/applications/cmdutils/reg/resource.h
 tags:
-  wine: 73f69d66b342af4c8339c23739ebeb1ff359e78b
+  wine: aa98e3f6da78135ecffaa50bb78ad906dfd4570d