diff --git a/libc/private/icu.h b/libc/private/icu.h
new file mode 100644
index 0000000..8e4aa80
--- /dev/null
+++ b/libc/private/icu.h
@@ -0,0 +1,88 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef _PRIVATE_ICU_H
+#define _PRIVATE_ICU_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_CONTROL_CHAR = 15,
+  U_FORMAT_CHAR = 16,
+};
+
+enum UEastAsianWidth {
+  U_EA_NEUTRAL,
+  U_EA_AMBIGUOUS,
+  U_EA_HALFWIDTH,
+  U_EA_FULLWIDTH,
+  U_EA_NARROW,
+  U_EA_WIDE,
+};
+
+enum UHangulSyllableType {
+  U_HST_NOT_APPLICABLE,
+  U_HST_LEADING_JAMO,
+  U_HST_VOWEL_JAMO,
+  U_HST_TRAILING_JAMO,
+  U_HST_LV_SYLLABLE,
+  U_HST_LVT_SYLLABLE,
+};
+
+int8_t __icu_charType(wint_t wc);
+int32_t __icu_getIntPropertyValue(wint_t wc, UProperty property);
+
+typedef UBool (*u_hasBinaryProperty_t)(UChar32, UProperty);
+
+void* __find_icu_symbol(const char* symbol_name);
+
+#endif  // _PRIVATE_ICU_H