diff --git a/coroutine/copy/Context.h b/coroutine/copy/Context.h
index db13604d3f..2cb2bc19c8 100644
--- a/coroutine/copy/Context.h
+++ b/coroutine/copy/Context.h
@@ -23,9 +23,12 @@
 
 #define COROUTINE __attribute__((noreturn)) void
 
+#ifdef HAVE_STDINT_H
+#include <stdint.h>
 #if INTPTR_MAX <= INT32_MAX
 #define COROUTINE_LIMITED_ADDRESS_SPACE
 #endif
+#endif
 
 // This stack copying implementation which uses a private stack for each coroutine, including the main one.
 #define COROUTINE_PRIVATE_STACK
diff --git a/coroutine/ucontext/Context.h b/coroutine/ucontext/Context.h
index 797108642b..39d7ca70ca 100644
--- a/coroutine/ucontext/Context.h
+++ b/coroutine/ucontext/Context.h
@@ -16,9 +16,12 @@
 
 #define COROUTINE __attribute__((noreturn)) void
 
+#ifdef HAVE_STDINT_H
+#include <stdint.h>
 #if INTPTR_MAX <= INT32_MAX
 #define COROUTINE_LIMITED_ADDRESS_SPACE
 #endif
+#endif
 
 struct coroutine_context
 {