diff --git a/libc/include/llvm-libc-types/__barrier_type.h b/libc/include/llvm-libc-types/__barrier_type.h
index 59712619e917d..5752f832f04b9 100644
--- a/libc/include/llvm-libc-types/__barrier_type.h
+++ b/libc/include/llvm-libc-types/__barrier_type.h
@@ -9,6 +9,8 @@
 #ifndef LLVM_LIBC_TYPES__BARRIER_TYPE_H
 #define LLVM_LIBC_TYPES__BARRIER_TYPE_H
 
+#include <stdbool.h>
+
 typedef struct __attribute__((aligned(8 /* alignof (Barrier) */))) {
   unsigned expected;
   unsigned waiting;
diff --git a/libc/include/llvm-libc-types/pthread_barrierattr_t.h b/libc/include/llvm-libc-types/pthread_barrierattr_t.h
index 064be5bfb6721..b62fdc0f72e12 100644
--- a/libc/include/llvm-libc-types/pthread_barrierattr_t.h
+++ b/libc/include/llvm-libc-types/pthread_barrierattr_t.h
@@ -9,6 +9,8 @@
 #ifndef LLVM_LIBC_TYPES_PTHREAD_BARRIERATTR_T_H
 #define LLVM_LIBC_TYPES_PTHREAD_BARRIERATTR_T_H
 
+#include <stdbool.h>
+
 typedef struct {
   bool pshared;
 } pthread_barrierattr_t;