diff --git a/src/core/MixHelpers.cpp b/src/core/MixHelpers.cpp
index 7ff8dea1e..cdbf079d3 100644
--- a/src/core/MixHelpers.cpp
+++ b/src/core/MixHelpers.cpp
@@ -26,6 +26,8 @@
 #include "lmms_math.h"
 #include "ValueBuffer.h"
 
+#include <cstdio>
+
 
 static bool s_NaNHandler;