diff --git a/src/common/utility/memarena.cpp b/src/common/utility/memarena.cpp
index 5439d73390..2a9467dc21 100644
--- a/src/common/utility/memarena.cpp
+++ b/src/common/utility/memarena.cpp
@@ -40,7 +40,14 @@
 #include "basics.h"
 #include "memarena.h"
 #include "cmdlib.h"
-#include "m_alloc.h"
+
+#if __has_include("m_alloc.h")
+	#include "m_alloc.h"
+#else
+	#define M_Malloc malloc
+	#define M_Realloc realloc
+	#define M_Free free
+#endif
 
 struct FMemArena::Block
 {
diff --git a/src/common/utility/tarray.h b/src/common/utility/tarray.h
index a8742a96b3..75df8dffb2 100644
--- a/src/common/utility/tarray.h
+++ b/src/common/utility/tarray.h
@@ -61,7 +61,13 @@
 #include <stdint.h>			// for mingw
 #endif
 
-#include "m_alloc.h"
+#if __has_include("m_alloc.h")
+	#include "m_alloc.h"
+#else
+	#define M_Malloc malloc
+	#define M_Realloc realloc
+	#define M_Free free
+#endif
 
 template<typename T> class TIterator
 {
@@ -1925,3 +1931,8 @@ private:
 	unsigned int Count;
 };
 
+#if !__has_include("m_alloc.h")
+	#undef M_Malloc
+	#undef M_Realloc
+	#undef M_Free
+#endif