diff --git a/dlls/odbccp32/odbccp32.c b/dlls/odbccp32/odbccp32.c
index 0d4662bb724..d34920380f3 100644
--- a/dlls/odbccp32/odbccp32.c
+++ b/dlls/odbccp32/odbccp32.c
@@ -522,9 +522,13 @@ BOOL WINAPI SQLInstallDriverManagerW(LPWSTR lpszPath, WORD cbPathMax,
     UINT len;
     WCHAR path[MAX_PATH];
 
-    clear_errors();
     TRACE("(%p %d %p)\n", lpszPath, cbPathMax, pcbPathOut);
 
+    if (cbPathMax < MAX_PATH)
+        return FALSE;
+
+    clear_errors();
+
     len = GetSystemDirectoryW(path, MAX_PATH);
 
     if (pcbPathOut)
@@ -545,9 +549,13 @@ BOOL WINAPI SQLInstallDriverManager(LPSTR lpszPath, WORD cbPathMax,
     WORD len, cbOut = 0;
     WCHAR path[MAX_PATH];
 
-    clear_errors();
     TRACE("(%p %d %p)\n", lpszPath, cbPathMax, pcbPathOut);
 
+    if (cbPathMax < MAX_PATH)
+        return FALSE;
+
+    clear_errors();
+
     ret = SQLInstallDriverManagerW(path, MAX_PATH, &cbOut);
     if (ret)
     {
diff --git a/dlls/odbccp32/tests/misc.c b/dlls/odbccp32/tests/misc.c
index 044846cc7d4..40846e5c9ef 100644
--- a/dlls/odbccp32/tests/misc.c
+++ b/dlls/odbccp32/tests/misc.c
@@ -86,28 +86,23 @@ static void test_SQLInstallDriverManager(void)
     bool_ret = SQLInstallDriverManager(NULL, 0, NULL);
     sql_ret = SQLInstallerErrorW(1, &error_code, NULL, 0, NULL);
     ok(!bool_ret, "SQLInstallDriverManager unexpectedly succeeded\n");
-    todo_wine
     ok(sql_ret == SQL_SUCCESS_WITH_INFO && error_code == ODBC_ERROR_INVALID_BUFF_LEN,
         "Expected SQLInstallDriverManager to fail with ODBC_ERROR_INVALID_BUFF_LEN\n");
 
     /* Length smaller than MAX_PATH */
     bool_ret = SQLInstallDriverManager(target_path, MAX_PATH / 2, NULL);
     sql_ret = SQLInstallerErrorW(1, &error_code, NULL, 0, NULL);
-    todo_wine {
     ok(!bool_ret, "SQLInstallDriverManager unexpectedly succeeded\n");
     ok(sql_ret == SQL_SUCCESS_WITH_INFO && error_code == ODBC_ERROR_INVALID_BUFF_LEN,
         "Expected SQLInstallDriverManager to fail with ODBC_ERROR_INVALID_BUFF_LEN\n");
-    }
 
     path_out = 0xcafe;
     bool_ret = SQLInstallDriverManager(target_path, MAX_PATH / 2, &path_out);
     sql_ret = SQLInstallerErrorW(1, &error_code, NULL, 0, NULL);
-    todo_wine {
     ok(!bool_ret, "SQLInstallDriverManager unexpectedly succeeded\n");
     ok(sql_ret == SQL_SUCCESS_WITH_INFO && error_code == ODBC_ERROR_INVALID_BUFF_LEN,
         "Expected SQLInstallDriverManager to fail with ODBC_ERROR_INVALID_BUFF_LEN\n");
     ok(path_out == 0xcafe, "Expected path_out to not have changed\n");
-    }
 
     /* Length OK */
     bool_ret = SQLInstallDriverManager(target_path, MAX_PATH, NULL);