diff --git a/js/src/jit/ExecutableAllocator.cpp b/js/src/jit/ExecutableAllocator.cpp
index 08e550d38f7..8f72f28247c 100644
--- a/js/src/jit/ExecutableAllocator.cpp
+++ b/js/src/jit/ExecutableAllocator.cpp
@@ -29,6 +29,10 @@
 
 #include "js/MemoryMetrics.h"
 
+#ifdef __APPLE__
+#include "TargetConditionals.h"
+#endif
+
 using namespace js::jit;
 
 size_t ExecutableAllocator::pageSize = 0;