diff --git a/libc/src/__support/FPUtil/CMakeLists.txt b/libc/src/__support/FPUtil/CMakeLists.txt
--- a/libc/src/__support/FPUtil/CMakeLists.txt
+++ b/libc/src/__support/FPUtil/CMakeLists.txt
@@ -4,6 +4,7 @@
     FEnvImpl.h
   DEPENDS
     libc.include.fenv
+    libc.include.math
     libc.src.__support.macros.attributes
 )