diff --git a/libc/config/linux/x86_64/entrypoints.txt b/libc/config/linux/x86_64/entrypoints.txt
--- a/libc/config/linux/x86_64/entrypoints.txt
+++ b/libc/config/linux/x86_64/entrypoints.txt
@@ -195,7 +195,7 @@
     libc.src.unistd.write
 
     # wchar.h entrypoints
-    # libc.src.wchar.wctob
+    libc.src.wchar.wctob
 )
 
 set(TARGET_LIBM_ENTRYPOINTS
diff --git a/libc/include/CMakeLists.txt b/libc/include/CMakeLists.txt
--- a/libc/include/CMakeLists.txt
+++ b/libc/include/CMakeLists.txt
@@ -184,6 +184,7 @@
     .llvm-libc-macros.file_seek_macros
     .llvm-libc-macros.stdio_macros
     .llvm-libc-types.size_t
+    .llvm-libc-types.ssize_t
     .llvm-libc-types.FILE
     .llvm-libc-types.cookie_io_functions_t
 )
diff --git a/libc/src/wchar/CMakeLists.txt b/libc/src/wchar/CMakeLists.txt
--- a/libc/src/wchar/CMakeLists.txt
+++ b/libc/src/wchar/CMakeLists.txt
@@ -7,5 +7,6 @@
     wctob.h
   DEPENDS 
     libc.include.stdio
+    libc.include.wchar
     libc.src.__support.wctype_utils
 )