diff --git a/libc/src/stdlib/bsearch.h b/libc/src/stdlib/bsearch.h
index 1de7e051ff6c41a..3590198ba55704f 100644
--- a/libc/src/stdlib/bsearch.h
+++ b/libc/src/stdlib/bsearch.h
@@ -9,7 +9,7 @@
 #ifndef LLVM_LIBC_SRC_STDLIB_BSEARCH_H
 #define LLVM_LIBC_SRC_STDLIB_BSEARCH_H
 
-#include <stdlib.h>
+#include <stddef.h> // size_t
 
 namespace LIBC_NAMESPACE {