diff --git a/src/FDM/JSBSim/input_output/FGfdmSocket.cpp b/src/FDM/JSBSim/input_output/FGfdmSocket.cpp
index 1eb7859d4..85cb88c4f 100644
--- a/src/FDM/JSBSim/input_output/FGfdmSocket.cpp
+++ b/src/FDM/JSBSim/input_output/FGfdmSocket.cpp
@@ -41,6 +41,7 @@ INCLUDES
 #include <iostream>
 #include <iomanip>
 #include <cstring>
+#include <cstdio>
 #include "FGfdmSocket.h"
 #include "string_utilities.h"