diff --git a/configure.ac b/configure.ac
index 47cad63..3867664 100644
--- a/configure.ac
+++ b/configure.ac
@@ -103,7 +103,8 @@ AC_FUNC_REALLOC
 AC_CHECK_FUNCS([alarm dup2 gettimeofday localtime_r memset socket strcasecmp \
 		strchr strcspn strerror strncasecmp strpbrk strrchr strtol \
 		getifaddrs if_nameindex sigaction nanosleep \
-		gettimeofday getrusage setitimer tcsetattr mlockall])
+		gettimeofday getrusage setitimer tcsetattr mlockall \
+		setpriority])
 
 # Check for CPU.
 # This requires install-sh, config.sub, config.guess from automake.
diff --git a/src/dpimp.c b/src/dpimp.c
index 10c6a07..544ffbb 100644
--- a/src/dpimp.c
+++ b/src/dpimp.c
@@ -434,7 +434,7 @@ main(int argc, char **argv)
     ** we can, since a slow response will cause the 10 monitor to declare
     ** the interface dead.
     */
-#if CENV_SYS_SOLARIS || CENV_SYS_DECOSF || CENV_SYS_XBSD || CENV_SYS_LINUX
+#if HAVE_SETPRIORITY
     if (setpriority(PRIO_PROCESS, 0, -20) < 0)
 	syserr(errno, "Warning - cannot set high priority");
 #elif CENV_SYS_UNIX		/* Try old generic Unix call */
@@ -455,8 +455,9 @@ main(int argc, char **argv)
 	dbprint("Started");
 
     /* General initialization */
-    if (geteuid() != 0)
-	efatal(1, "Must be superuser!");
+    if (geteuid() != 0) {
+	error("*** Must usually run as superuser; networking may fail! ***");
+    }
 
     if (!dp_main(&dp, argc, argv)) {
 	efatal(1, "DP init failed!");
diff --git a/src/dpni20.c b/src/dpni20.c
index 149fc2f..cb09fcd 100644
--- a/src/dpni20.c
+++ b/src/dpni20.c
@@ -320,7 +320,7 @@ main(int argc, char **argv)
 #if 0 /* was CENV_SYS_SOLARIS */
     if (nice(-20) == -1)
 	syserr(errno, "Warning - cannot set high priority");
-#elif CENV_SYS_SOLARIS || CENV_SYS_DECOSF || CENV_SYS_XBSD || CENV_SYS_LINUX
+#elif HAVE_SETPRIORITY
     if (setpriority(PRIO_PROCESS, 0, -20) < 0)
 	syserr(errno, "Warning - cannot set high priority");
 #endif
@@ -336,8 +336,9 @@ main(int argc, char **argv)
 	dbprint("Started");
 
     /* General initialization */
-    if (geteuid() != 0)
-	efatal(1, "Must be superuser!");
+    if (geteuid() != 0) {
+	error("*** Must usually run as superuser; networking may fail! ***");
+    }
 
     if (!dp_main(&dp, argc, argv)) {
 	efatal(1, "DP init failed!");