diff -Naur grace-5.1.22/configure grace-5.1.22.new/configure
--- grace-5.1.22/configure	2007-02-16 22:44:49.000000000 +0000
+++ grace-5.1.22.new/configure	2007-09-28 23:03:29.000000000 +0100
@@ -15614,7 +15614,7 @@
       int main(void) {
         char *vlib;
         vlib = nc_inq_libvers();
-        if (strcmp(vlib, "3.0") < 0) {
+        if (((vlib[0] == '"') && (strcmp(vlib, "\"3.0") < 0)) || ((vlib[0] != '"') && (strcmp(vlib, "3.0") < 0))){
           exit(1);
         }
         exit(0);
@@ -15722,7 +15722,7 @@
 cat >>conftest.$ac_ext <<_ACEOF
 /* end confdefs.h.  */
 
-#include <fftw.h>
+#include <dfftw.h>
 #include <string.h>
       int main(void) {
         char *vlib = (char *) fftw_version;
diff -Naur grace-5.1.22/src/fourier.c grace-5.1.22.new/src/fourier.c
--- grace-5.1.22/src/fourier.c	2004-07-04 03:47:45.000000000 +0700
+++ grace-5.1.22.new/src/fourier.c	2009-06-16 02:51:37.229858237 +0700
@@ -230,7 +230,7 @@
 #else
 /* Start of new FFTW-based transforms by Marcus H. Mendenhall */
 
-#include <fftw.h>
+#include <dfftw.h>
 #include <string.h>
 
 static char  *wisdom_file=0;