diff --git a/libc/bionic/libc_init_common.cpp b/libc/bionic/libc_init_common.cpp
index 1fc490e..68a7309 100644
--- a/libc/bionic/libc_init_common.cpp
+++ b/libc/bionic/libc_init_common.cpp
@@ -59,8 +59,8 @@
 uintptr_t __stack_chk_guard = 0;
 
 // Declared in <asm/page.h>.
-unsigned int __page_size = PAGE_SIZE;
-unsigned int __page_shift = PAGE_SHIFT;
+extern "C" unsigned int __page_size = PAGE_SIZE;
+extern "C" unsigned int __page_shift = PAGE_SHIFT;
 
 /* Init TLS for the initial thread. Called by the linker _before_ libc is mapped
  * in memory. Beware: all writes to libc globals from this function will