diff --git a/src/f9/f90100.h b/src/f9/f90100.h
index b2bbfb946..b73ec9fa4 100644
--- a/src/f9/f90100.h
+++ b/src/f9/f90100.h
@@ -39,7 +39,7 @@ class TEstrai_mask : public TMask
   static bool dataend_handler(TMask_field& f, KEY key);
 
 public:
-  static TString get_numdoc_fp(int numreg);
+  static TString get_numdoc_exp_fp(int numreg);
   TEstrai_mask();
 };