diff --git a/dlls/msi/source.c b/dlls/msi/source.c
index 3ffa5d800c5..ca4a8ea3ede 100644
--- a/dlls/msi/source.c
+++ b/dlls/msi/source.c
@@ -1016,7 +1016,7 @@ UINT WINAPI MsiSourceListAddMediaDiskW(LPCWSTR szProduct, LPCWSTR szUserSid,
 
     rc = OpenSourceKey(szProduct, &sourcekey, MSICODE_PRODUCT, dwContext, FALSE);
     if (rc != ERROR_SUCCESS)
-        return ERROR_UNKNOWN_PRODUCT;
+        return rc;
 
     OpenMediaSubkey(sourcekey,&mediakey,TRUE);
 
diff --git a/dlls/msi/tests/source.c b/dlls/msi/tests/source.c
index d2e3b021ed2..d4a1e3b7215 100644
--- a/dlls/msi/tests/source.c
+++ b/dlls/msi/tests/source.c
@@ -2024,11 +2024,8 @@ static void test_MsiSourceListAddMediaDisk(void)
     r = MsiSourceListAddMediaDiskA(prodcode, usersid,
                                    MSIINSTALLCONTEXT_USERUNMANAGED,
                                    MSICODE_PRODUCT, 1, "label", "prompt");
-    todo_wine
-    {
-        ok(r == ERROR_BAD_CONFIGURATION,
-           "Expected ERROR_BAD_CONFIGURATION, got %d\n", r);
-    }
+    ok(r == ERROR_BAD_CONFIGURATION,
+       "Expected ERROR_BAD_CONFIGURATION, got %d\n", r);
 
     res = RegCreateKeyA(userkey, "SourceList", &source);
     ok(res == ERROR_SUCCESS, "Expected ERROR_SUCCESS, got %d\n", res);
@@ -2158,11 +2155,8 @@ static void test_MsiSourceListAddMediaDisk(void)
     r = MsiSourceListAddMediaDiskA(prodcode, usersid,
                                    MSIINSTALLCONTEXT_USERMANAGED,
                                    MSICODE_PRODUCT, 1, "label", "prompt");
-    todo_wine
-    {
-        ok(r == ERROR_BAD_CONFIGURATION,
-           "Expected ERROR_BAD_CONFIGURATION, got %d\n", r);
-    }
+    ok(r == ERROR_BAD_CONFIGURATION,
+       "Expected ERROR_BAD_CONFIGURATION, got %d\n", r);
 
     res = RegCreateKeyA(userkey, "SourceList", &source);
     ok(res == ERROR_SUCCESS, "Expected ERROR_SUCCESS, got %d\n", res);
@@ -2199,11 +2193,8 @@ static void test_MsiSourceListAddMediaDisk(void)
     r = MsiSourceListAddMediaDiskA(prodcode, NULL,
                                    MSIINSTALLCONTEXT_MACHINE,
                                    MSICODE_PRODUCT, 1, "label", "prompt");
-    todo_wine
-    {
-        ok(r == ERROR_BAD_CONFIGURATION,
-           "Expected ERROR_BAD_CONFIGURATION, got %d\n", r);
-    }
+    ok(r == ERROR_BAD_CONFIGURATION,
+       "Expected ERROR_BAD_CONFIGURATION, got %d\n", r);
 
     res = RegCreateKeyA(prodkey, "SourceList", &source);
     ok(res == ERROR_SUCCESS, "Expected ERROR_SUCCESS, got %d\n", res);