diff -Naur socat-1.7.2.1-orig/procan-cdefs.c socat-1.7.2.1/procan-cdefs.c

--- socat-1.7.2.1-orig/procan-cdefs.c	2010-10-06 03:25:30.000000000 -0400

+++ socat-1.7.2.1/procan-cdefs.c	2012-11-20 17:15:37.521215330 -0500

@@ -20,7 +20,7 @@

    fprintf(outfile, "#define FD_SETSIZE %u\n", FD_SETSIZE);

 #endif

 #ifdef NFDBITS

-   fprintf(outfile, "#define NFDBITS "F_Zu"\n", NFDBITS);

+   fprintf(outfile, "#define NFDBITS %u\n", NFDBITS);

 #endif

 #ifdef O_RDONLY

    fprintf(outfile, "#define O_RDONLY %u\n", O_RDONLY);