diff --git a/src/WeatherCM/linintp2.cpp b/src/WeatherCM/linintp2.cpp
index 3c6e640fb..77207f38f 100644
--- a/src/WeatherCM/linintp2.cpp
+++ b/src/WeatherCM/linintp2.cpp
@@ -31,6 +31,7 @@
 
 #include <simgear/compiler.h>
 #include STL_IOSTREAM
+#include <simgear/debug/logstream.hxx>
 
 #include <float.h>
 #include <math.h>
diff --git a/src/WeatherCM/sphrintp.cpp b/src/WeatherCM/sphrintp.cpp
index 980e699e3..52b43db86 100644
--- a/src/WeatherCM/sphrintp.cpp
+++ b/src/WeatherCM/sphrintp.cpp
@@ -31,6 +31,7 @@
 
 #include <simgear/compiler.h>
 #include STL_IOSTREAM
+#include <simgear/debug/logstream.hxx>
 
 #include <math.h>
 #include "sphrintp.h"