diff --git a/samples/cxx/NASA_coeffs/NASA_coeffs.cpp b/samples/cxx/NASA_coeffs/NASA_coeffs.cpp
index ab0c3f5c1..87aa3fc3b 100644
--- a/samples/cxx/NASA_coeffs/NASA_coeffs.cpp
+++ b/samples/cxx/NASA_coeffs/NASA_coeffs.cpp
@@ -1,5 +1,7 @@
 #include "cantera/IdealGasMix.h"    // defines class IdealGasMix
 
+#include <cstdio>
+
 using namespace Cantera;
 
 // The program is put into a function so that error handling code can
diff --git a/samples/cxx/combustor/combustor.cpp b/samples/cxx/combustor/combustor.cpp
index fb783030c..e49770876 100644
--- a/samples/cxx/combustor/combustor.cpp
+++ b/samples/cxx/combustor/combustor.cpp
@@ -10,6 +10,8 @@
 #include "cantera/zerodim.h"
 #include "cantera/IdealGasMix.h"
 
+#include <fstream>
+
 using namespace Cantera;
 
 void runexample()