diff --git a/lib/PoissonRecon/Geometry.h b/lib/PoissonRecon/Geometry.h
index 0d73eda..7105ec8 100755
--- a/lib/PoissonRecon/Geometry.h
+++ b/lib/PoissonRecon/Geometry.h
@@ -32,6 +32,7 @@ DAMAGE.
 #include <math.h>
 #include <vector>
 #include <stdlib.h>
+#include <stdio.h>
 #include "Hash.h"
 
 template<class Real>