diff --git a/build/Makefile b/build/Makefile
index 663014406..c97dbf982 100644
--- a/build/Makefile
+++ b/build/Makefile
@@ -204,9 +204,6 @@ endif
 
 ifeq ($(GR), yes)
     FPPFLAGS += -DGR
-ifeq ($(METRIC), kerr)
-    FPPFLAGS += -DKERR
-endif
 ifeq ($(ISENTROPIC), yes)
     FPPFLAGS += -DISENTROPIC
     FPPFLAGS += -DLIGHTCURVE
diff --git a/src/tests/test_gr.F90 b/src/tests/test_gr.F90
index ef61c5aa8..ea5398427 100644
--- a/src/tests/test_gr.F90
+++ b/src/tests/test_gr.F90
@@ -53,11 +53,7 @@ end subroutine test_gr
 !-----------------------------------------------------------------------
 subroutine test_precession(ntests,npass)
  use metric_tools, only:imetric,imet_kerr,imet_schwarzschild
-#ifdef KERR
  use metric,       only:a
-#else
- real :: a
-#endif
  integer, intent(inout) :: ntests,npass
  integer :: nerr(6),norbits,nstepsperorbit
  real    :: dt,period,x0,vy0,tmax,angtol,postol
@@ -103,11 +99,7 @@ end subroutine test_precession
 subroutine test_inccirc(ntests,npass)
  use physcon,      only:pi
  use metric_tools, only:imetric,imet_kerr
-#ifdef KERR
  use metric,       only:a
-#else
- real :: a
-#endif
  integer, intent(inout) :: ntests,npass
  integer :: nerr(6),norbits,nstepsperorbit
  real    :: dt,period,tmax