diff --git a/src/sudo_edit.c b/src/sudo_edit.c
index 20b7fbd8f..1c961befb 100644
--- a/src/sudo_edit.c
+++ b/src/sudo_edit.c
@@ -53,6 +53,18 @@
 
 #include "sudo.h"
 
+/*
+ * Emulate seteuid() via setresuid() or setreuid()
+ * Needed on HP-UX and perhaps others.
+ */
+#if defined(HAVE_SETRESUID)
+# define seteuid(u)	setresuid(-1, u, -1)
+# define setegid(g)	setresgid(-1, g, -1)
+#elif defined(HAVE_SETREUID)
+# define seteuid(u)	setreuid(-1, u)
+# define setegid(g)	setregid(-1, g)
+#endif
+
 extern struct user_details user_details;
 
 static void