diff --git a/testsuites/psxtests/configure.ac b/testsuites/psxtests/configure.ac
index 82c56e3dbf..5131ac98a6 100644
--- a/testsuites/psxtests/configure.ac
+++ b/testsuites/psxtests/configure.ac
@@ -53,6 +53,10 @@ AC_CHECK_DECLS([adjtime],[],[],[[#include <sys/time.h>]])
 # RTEMS provides a stub, despite newlib doesn't have sys/mman.h
 AC_CHECK_DECLS([mprotect],[],[],[[#include <sys/mman.h>]])
 
+# FIXME: IEEE Std 1003.1-2008 mandates seteuid in unistd.h
+# RTEMS provides it, despite newlib doesn't declare it.
+AC_CHECK_DECLS([seteuid],[],[],[#include <unistd.h>])
+
 # FIXME: We should get rid of this. It's a cludge.
 AC_CHECK_SIZEOF([off_t])
 
diff --git a/testsuites/psxtests/psximfs02/init.c b/testsuites/psxtests/psximfs02/init.c
index 861bf0cca5..a9c79a0dd5 100644
--- a/testsuites/psxtests/psximfs02/init.c
+++ b/testsuites/psxtests/psximfs02/init.c
@@ -20,6 +20,10 @@
 #include <rtems/libio.h>
 #include <rtems/libcsupport.h>
 
+#if !HAVE_DECL_SETEUID
+extern int seteuid(uid_t euid);
+#endif
+
 void IMFS_dump( void );
 rtems_task Init(
   rtems_task_argument argument