diff --git a/unicode-data.cpp b/unicode-data.cpp
index 22f8b0f0b..30ea60f61 100644
--- a/unicode-data.cpp
+++ b/unicode-data.cpp
@@ -1649,3 +1649,7 @@ const std::map<char32_t, char32_t> unicode_map_lowercase = {
 {0x1E917, 0x1E939}, {0x1E918, 0x1E93A}, {0x1E919, 0x1E93B}, {0x1E91A, 0x1E93C}, {0x1E91B, 0x1E93D}, {0x1E91C, 0x1E93E},
 {0x1E91D, 0x1E93F}, {0x1E91E, 0x1E940}, {0x1E91F, 0x1E941}, {0x1E920, 0x1E942}, {0x1E921, 0x1E943},
 };
+
+const std::map<std::string, std::wstring> unicode_regex_to_wregex = {
+    
+};
\ No newline at end of file
diff --git a/unicode-data.h b/unicode-data.h
index b99500b8f..46b774668 100644
--- a/unicode-data.h
+++ b/unicode-data.h
@@ -14,3 +14,5 @@ extern const std::vector<std::pair<uint32_t, uint32_t>> unicode_ranges_symbol;
 extern const std::vector<std::pair<uint32_t, uint32_t>> unicode_ranges_control;
 extern const std::multimap<uint32_t, uint32_t> unicode_map_nfd;
 extern const std::map<char32_t, char32_t> unicode_map_lowercase;
+extern const std::map<std::string, std::wstring> unicode_regex_to_wregex;
+extern const std::map<std::string, std::string> unicode_regex_to_regex;
\ No newline at end of file