diff --git a/Makefile b/Makefile
index 1d94873..4eb8947 100644
--- a/Makefile
+++ b/Makefile
@@ -67,7 +67,7 @@ GIT_DIRTY ?= $(shell test -n "$$(git status --porcelain)" && echo "-dirty")
 # Note: can't use ?= for FC because GNU Make defaults to f77
 FC        = gfortran
 LD        = gfortran
-FFLAGS   += -J$(OBJDIR) -I$(INCDIR) -ffree-line-length-none -fPIC
+FFLAGS   += -J$(OBJDIR) -I$(INCDIR) -ffree-line-length-none -fPIC -frecursive
 LDFLAGS  += -L$(LIBDIR)
 CPPFLAGS += -DREVISION=\"$(GIT_REV)$(GIT_DIRTY)\" -DPREFIX=\"$(PREFIX)\"
 
diff --git a/src/equilibrium.f90 b/src/equilibrium.f90
index d5cc50e..a97d574 100644
--- a/src/equilibrium.f90
+++ b/src/equilibrium.f90
@@ -911,7 +911,7 @@ contains
     ! Note: all output arguments are optional.
     use gray_params,          only : iequil
     use reflections,          only : inside
-    use const_and_precisions, only : one, pi
+    use const_and_precisions, only : pi
 
     implicit none
 
@@ -1217,7 +1217,6 @@ contains
     ! (R, z) in cylindrical coordinates
     !
     ! Note: all output arguments are optional.
-    use gray_params, only : iequil
 
     implicit none
 
diff --git a/src/magsurf_data.f90 b/src/magsurf_data.f90
index f4584db..a841d20 100644
--- a/src/magsurf_data.f90
+++ b/src/magsurf_data.f90
@@ -458,7 +458,7 @@ contains
 
     ! local variables
     integer :: npoints,np,info,ic,ier,iopt,m
-    real(wp_) :: ra,rb,za,zb,th,zc,val
+    real(wp_) :: ra,rb,za,zb,th,zc
     real(wp_), dimension(mest) :: zeroc
     real(wp_), dimension(psi_spline%nknots_x) :: czc