diff --git a/utils/GPSsmooth/UGear_command.cxx b/utils/GPSsmooth/UGear_command.cxx
index 85485749f..c490a4238 100644
--- a/utils/GPSsmooth/UGear_command.cxx
+++ b/utils/GPSsmooth/UGear_command.cxx
@@ -1,4 +1,5 @@
 #include <cstring>
+#include <cstdio>
 
 #include "UGear_command.hxx"