--- a/elem.c
+++ b/elem.c
@@ -11,6 +11,9 @@
 #include "deutsch.h"
 #endif
 
+double amsumme;
+FL_OBJECT *massensumme;
+
 
 
 FD_Periodensystem *create_form_Periodensystem(void)
--- a/elem.h
+++ b/elem.h
@@ -154,7 +154,7 @@ typedef struct {
   void *vdata;
   long ldata;
 } FD_Periodensystem;
-double amsumme;
+extern double amsumme;
 extern FD_Periodensystem * create_form_Periodensystem(void);
-        FL_OBJECT *massensumme;
+extern FL_OBJECT *massensumme;
 #endif /* FD_Periodensystem_h_ */