diff --git a/arch/Linux-i686-nag.pdbg b/arch/Linux-i686-nag.pdbg
index e8f7ed6a12..052339f18a 100644
--- a/arch/Linux-i686-nag.pdbg
+++ b/arch/Linux-i686-nag.pdbg
@@ -6,7 +6,7 @@ LD       = /home/jv244/bin/mpif90
 AR       = ar -r
 DFLAGS   = -D__NAG -D__FFTSG  -D__parallel -D__BLACS -D__SCALAPACK 
 CPPFLAGS = -C $(DFLAGS) -traditional
-FCFLAGS  = -g -C -mismatch_all -f77 -nan
+FCFLAGS  = -g -C=all -mismatch_all -f77 -nan
 LDFLAGS  = $(FCFLAGS)
 LIBS     = /home/jv244/SCALAPACK/libscalapack.a /home/jv244/BLACS/LIB/blacsF77init_MPI-LINUX-0.a /home/jv244/BLACS/LIB/blacs_MPI-LINUX-0.a /home/jv244/LAPACK_T1/lapack_LINUX.a /home/jv244/LAPACK_T1/blas_LINUX.a -lg2c
 
diff --git a/arch/Linux-i686-nag.sdbg b/arch/Linux-i686-nag.sdbg
index 06bc34d010..764c6e2580 100644
--- a/arch/Linux-i686-nag.sdbg
+++ b/arch/Linux-i686-nag.sdbg
@@ -6,7 +6,7 @@ LD       = f95
 AR       = ar -r
 DFLAGS   = -D__NAG -D__FFTSG 
 CPPFLAGS = -C $(DFLAGS) -traditional
-FCFLAGS  = -O0 -g -C -mismatch_all -f77 -nan
+FCFLAGS  = -O0 -g -C=all -mismatch_all -f77 -nan
 LDFLAGS  = $(FCFLAGS)
 LIBS     = /home/jv244/LAPACK_T1/lapack_LINUX.a /home/jv244/LAPACK_T1/blas_LINUX.a -lg2c