diff --git a/src/rtklib.h b/src/rtklib.h
index c64411c294e0b8c4e0970daed72aa04a6f2d763b..f1f2fa66af52fdb8c85431b4e641c11895c57c4b 100644
--- a/src/rtklib.h
+++ b/src/rtklib.h
@@ -54,6 +54,10 @@ extern "C" {
 #define EXPORT
 #endif
 
+/* enable other satellite systems---------------------------------------------*/
+#define ENAGLO
+#define ENAGAL
+
 /* constants -----------------------------------------------------------------*/
 
 #define VER_RTKLIB  "demo5"             /* library version */