diff --git a/libc/private/icu4x.h b/libc/private/icu.h
similarity index 68%
rename from libc/private/icu4x.h
rename to libc/private/icu.h
index 8b7e1d0..8e4aa80 100644
--- a/libc/private/icu4x.h
+++ b/libc/private/icu.h
@@ -26,20 +26,38 @@
  * SUCH DAMAGE.
  */
 
-#pragma once
+#ifndef _PRIVATE_ICU_H
+#define _PRIVATE_ICU_H
 
-#include <ctype.h>
 #include <stdint.h>
 #include <wchar.h>
 
+typedef int8_t UBool;
+#define FALSE 0
+#define TRUE 1
+
+typedef int32_t UChar32;
+
+enum UProperty {
+  UCHAR_ALPHABETIC = 0,
+  UCHAR_DEFAULT_IGNORABLE_CODE_POINT = 5,
+  UCHAR_LOWERCASE = 22,
+  UCHAR_POSIX_ALNUM = 44,
+  UCHAR_POSIX_BLANK = 45,
+  UCHAR_POSIX_GRAPH = 46,
+  UCHAR_POSIX_PRINT = 47,
+  UCHAR_POSIX_XDIGIT = 48,
+  UCHAR_UPPERCASE = 30,
+  UCHAR_WHITE_SPACE = 31,
+  UCHAR_EAST_ASIAN_WIDTH = 0x1004,
+  UCHAR_HANGUL_SYLLABLE_TYPE = 0x100b,
+};
+
 enum UCharCategory {
   U_NON_SPACING_MARK = 6,
   U_ENCLOSING_MARK = 7,
-  U_DECIMAL_NUMBER = 9,
   U_CONTROL_CHAR = 15,
   U_FORMAT_CHAR = 16,
-  U_DASH_PUNCTUATION = 19,
-  U_OTHER_PUNCTUATION = 23,
 };
 
 enum UEastAsianWidth {
@@ -60,24 +78,11 @@
   U_HST_LVT_SYLLABLE,
 };
 
-__BEGIN_DECLS
+int8_t __icu_charType(wint_t wc);
+int32_t __icu_getIntPropertyValue(wint_t wc, UProperty property);
 
-uint8_t __icu4x_bionic_general_category(uint32_t cp);
-uint8_t __icu4x_bionic_east_asian_width(uint32_t cp);
-uint8_t __icu4x_bionic_hangul_syllable_type(uint32_t cp);
+typedef UBool (*u_hasBinaryProperty_t)(UChar32, UProperty);
 
-bool __icu4x_bionic_is_alphabetic(uint32_t cp);
-bool __icu4x_bionic_is_default_ignorable_code_point(uint32_t cp);
-bool __icu4x_bionic_is_lowercase(uint32_t cp);
-bool __icu4x_bionic_is_alnum(uint32_t cp);
-bool __icu4x_bionic_is_blank(uint32_t cp);
-bool __icu4x_bionic_is_graph(uint32_t cp);
-bool __icu4x_bionic_is_print(uint32_t cp);
-bool __icu4x_bionic_is_xdigit(uint32_t cp);
-bool __icu4x_bionic_is_white_space(uint32_t cp);
-bool __icu4x_bionic_is_uppercase(uint32_t cp);
+void* __find_icu_symbol(const char* symbol_name);
 
-uint32_t __icu4x_bionic_to_upper(uint32_t ch);
-uint32_t __icu4x_bionic_to_lower(uint32_t ch);
-
-__END_DECLS
+#endif  // _PRIVATE_ICU_H