diff --git a/src/endf.f90 b/src/endf.f90
index 620c3f5b..5371d930 100644
--- a/src/endf.f90
+++ b/src/endf.f90
@@ -17,7 +17,7 @@ module endf
 
    !--Public variables
    integer,public::npage=306
-   integer,public::iverf
+   integer,public::iverf=-1
    real(kr),public::c1h,c2h
    integer,public::l1h,l2h,n1h,n2h,math,mfh,mth,nsh,nsp,nsc
    real(kr),public::thr6