diff --git a/simgear/misc/sg_dir.cxx b/simgear/misc/sg_dir.cxx
index 0aea771b..a6711a4c 100644
--- a/simgear/misc/sg_dir.cxx
+++ b/simgear/misc/sg_dir.cxx
@@ -25,6 +25,7 @@
 #include <simgear/misc/sg_dir.hxx>
 #include <math.h>
 #include <stdlib.h>
+#include <cstdio>
 
 #ifdef _WIN32
 #  define WIN32_LEAN_AND_MEAN
diff --git a/simgear/scene/model/SGText.cxx b/simgear/scene/model/SGText.cxx
index e87b48a7..21638793 100644
--- a/simgear/scene/model/SGText.cxx
+++ b/simgear/scene/model/SGText.cxx
@@ -20,6 +20,8 @@
 #  include <simgear_config.h>
 #endif
 
+#include <cstdio>
+
 #include "SGText.hxx"
 
 #include <simgear/math/SGMath.hxx>