diff -urp ltrace-0.5/sysdeps/linux-gnu/s390/arch.h ltrace-0.5-64-31/sysdeps/linux-gnu/s390/arch.h
--- ltrace-0.5/sysdeps/linux-gnu/s390/arch.h	2006-04-24 16:06:23.000000000 -0400
+++ ltrace-0.5-64-31/sysdeps/linux-gnu/s390/arch.h	2009-02-25 13:56:16.000000000 -0500
@@ -12,6 +12,11 @@
 #define LT_ELF_MACHINE	EM_S390
 #define LT_ELFCLASS2	ELFCLASS32
 #define LT_ELF_MACHINE2	EM_S390
+
+/* __NR_fork, __NR_clone, __NR_clone2, __NR_vfork and __NR_execve
+   from asm-s390/unistd.h.  */
+#define FORK_EXEC_SYSCALLS , { 2, 120, -1, 190, 11 }
+
 #else
 #define LT_ELFCLASS	ELFCLASS32
 #define LT_ELF_MACHINE	EM_S390