diff --git a/gsl.spec b/gsl.spec
index 3182867..3d097e6 100644
--- a/gsl.spec
+++ b/gsl.spec
@@ -34,6 +34,7 @@ The gsl-devel package contains the header files necessary for
 developing programs using the GSL (GNU Scientific Library).
 
 %prep
+gcc -v
 %setup -q
 %patch0 -p1 -b .lib64
 %patch1 -p1 -b .libs
@@ -45,8 +46,8 @@ mv THANKS.aux THANKS
 
 %build
 %ifarch %{ix86}
-%configure CFLAGS="$CFLAGS -fgnu89-inline"
-# -ffp-contract=off -msse2 -mfpmath=sse"
+#RHEL builders fail with 387 floating-point unit, SSE required. Fedora builders do fine both ways. (January 2012)
+%configure CFLAGS="$CFLAGS -fgnu89-inline -msse2 -mfpmath=sse"
 %else
 %configure CFLAGS="$CFLAGS -fgnu89-inline"
 # -ffp-contract=off"
diff --git a/wrk.patch b/wrk.patch
index bcc3699..b40276d 100644
--- a/wrk.patch
+++ b/wrk.patch
@@ -131,7 +131,7 @@ diff -up wrk/ode-initval2/evolve.c.wrk wrk/ode-initval2/evolve.c
  
 diff -up wrk/ode-initval2/msbdf.c.wrk wrk/ode-initval2/msbdf.c
 --- wrk/ode-initval2/msbdf.c.wrk	2013-01-09 10:35:45.259960403 +0100
-+++ wrk/ode-initval2/msbdf.c	2013-01-22 10:54:04.377231938 +0100
++++ wrk/ode-initval2/msbdf.c	2013-01-23 15:17:29.745182852 +0100
 @@ -43,6 +43,8 @@
     framework.
  */
@@ -175,6 +175,15 @@ diff -up wrk/ode-initval2/msbdf.c.wrk wrk/ode-initval2/msbdf.c
    msbdf_state_t *state = (msbdf_state_t *) vstate;
  
    double *const z = state->z;
+@@ -1329,7 +1340,7 @@ msbdf_apply (void *vstate, size_t dim, d
+ 
+   { 
+     const int deltaord = ord - ordprev[0];
+-
++printf("ord\n%d\n%d\n", ord, ordprev);
+   if (deltaord > 1 || deltaord < -1)
+     {
+       printf ("-- order change %d\n", deltaord);
 @@ -1466,7 +1477,10 @@ msbdf_apply (void *vstate, size_t dim, d
    /* Calculate polynomial coefficients (l), error coefficient and
       auxiliary coefficients