diff --git a/sim/ppc/emul_netbsd.c b/sim/ppc/emul_netbsd.c
index 51f8e98ae32..950f1f4a696 100644
--- a/sim/ppc/emul_netbsd.c
+++ b/sim/ppc/emul_netbsd.c
@@ -40,15 +40,8 @@
 #include "emul_generic.h"
 #include "emul_netbsd.h"
 
-#ifdef HAVE_GETRUSAGE
-#ifndef HAVE_SYS_RESOURCE_H
-#undef HAVE_GETRUSAGE
-#endif
-#endif
-
-#ifdef HAVE_GETRUSAGE
+#ifdef HAVE_SYS_RESOURCE_H
 #include <sys/resource.h>
-int getrusage();
 #endif
 
 #if HAVE_SYS_IOCTL_H
diff --git a/sim/ppc/emul_unix.c b/sim/ppc/emul_unix.c
index be9e8385f52..88f6e3abc0a 100644
--- a/sim/ppc/emul_unix.c
+++ b/sim/ppc/emul_unix.c
@@ -87,15 +87,8 @@
 #include <sys/termio.h>
 #endif
 
-#ifdef HAVE_GETRUSAGE
-#ifndef HAVE_SYS_RESOURCE_H
-#undef HAVE_GETRUSAGE
-#endif
-#endif
-
-#ifdef HAVE_GETRUSAGE
+#ifdef HAVE_SYS_RESOURCE_H
 #include <sys/resource.h>
-int getrusage();
 #endif
 
 #if HAVE_DIRENT_H
diff --git a/sim/ppc/mon.c b/sim/ppc/mon.c
index 8ab42af8458..8bbabe6e50d 100644
--- a/sim/ppc/mon.c
+++ b/sim/ppc/mon.c
@@ -36,7 +36,6 @@
 
 #ifdef HAVE_SYS_RESOURCE_H
 #include <sys/resource.h>
-int getrusage();
 #endif
 
 #include "basics.h"