diff --git a/libc/cmake/modules/LLVMLibCArchitectures.cmake b/libc/cmake/modules/LLVMLibCArchitectures.cmake
--- a/libc/cmake/modules/LLVMLibCArchitectures.cmake
+++ b/libc/cmake/modules/LLVMLibCArchitectures.cmake
@@ -111,11 +111,11 @@
 # the libc CMake infrastructure. Also, this is where we also check if the target
 # architecture is currently supported.
 if(LIBC_TARGET_ARCHITECTURE STREQUAL "arm")
-  set(LIBC_LIBC_TARGET_ARCHITECTUREITECTURE_IS_ARM TRUE)
+  set(LIBC_TARGET_ARCHITECTURE_IS_ARM TRUE)
 elseif(LIBC_TARGET_ARCHITECTURE STREQUAL "aarch64")
-  set(LIBC_LIBC_TARGET_ARCHITECTUREITECTURE_IS_AARCH64 TRUE)
+  set(LIBC_TARGET_ARCHITECTURE_IS_AARCH64 TRUE)
 elseif(LIBC_TARGET_ARCHITECTURE STREQUAL "x86_64")
-  set(LIBC_LIBC_TARGET_ARCHITECTUREITECTURE_IS_X86 TRUE)
+  set(LIBC_TARGET_ARCHITECTURE_IS_X86 TRUE)
 else()
   message(FATAL_ERROR
           "Unsupported libc target architecture ${LIBC_TARGET_ARCHITECTURE}")