diff --git a/src/sources/batterysrc.h b/src/sources/batterysrc.h
index a61883c..bcd805f 100644
--- a/src/sources/batterysrc.h
+++ b/src/sources/batterysrc.h
@@ -26,7 +26,12 @@
 #include <tqstring.h>
 #include <list>
 
+#ifdef __TDE_HAVE_TDEHWLIB
 class TDEHardwareDevices;
+#else
+#define TDEHardwareDevices void
+#endif
+
 /**
  * BatterySrc fetches the state of charge of the battery from HAL
  * @author Ken Werner