diff --git a/libctru/source/allocator/linear.cpp b/libctru/source/allocator/linear.cpp
index 3e5dd12..7efb088 100644
--- a/libctru/source/allocator/linear.cpp
+++ b/libctru/source/allocator/linear.cpp
@@ -3,6 +3,7 @@ extern "C"
 	#include <3ds/types.h>
 	#include <3ds/allocator/linear.h>
 	#include <3ds/util/rbtree.h>
+	#include <string.h> // for memcpy
 }
 
 #include "mem_pool.h"