diff --git a/src/QGC.h b/src/QGC.h
index 24fcab9c8eb3d2686dcc03f0d1253f1b674d0c02..e6660abb6fbdc8e9fe6af8009f1377931065846a 100644
--- a/src/QGC.h
+++ b/src/QGC.h
@@ -51,7 +51,7 @@ inline bool isinf(T value)
 	return (value == std::numeric_limits<T>::infinity() || (-1 * value) == std::numeric_limits<T>::infinity()) && std::numeric_limits<T>::has_infinity;
 }
 #endif
-#elif defined __APPLE__
+#elif defined __APPLE__ || defined Q_OS_LINUX
 #include <cmath>
 #ifndef isnan
 #define isnan(x) std::isnan(x)