diff --git a/tools/munin-plugins-busybox/common.c b/tools/munin-plugins-busybox/common.c
index 3d78e518..fd291f06 100644
--- a/tools/munin-plugins-busybox/common.c
+++ b/tools/munin-plugins-busybox/common.c
@@ -1,4 +1,5 @@
 #include <stdio.h>
+#include <stdlib.h>
 
 int writeyes(void) {
 	puts("yes");
@@ -12,3 +13,11 @@ int writeno(const char *s) {
 		puts("no");
 	return 1;
 }
+
+int getenvint(const char *name, int defvalue) {
+	const char *value;
+	value = getenv(name);
+	if(value == NULL)
+		return defvalue;
+	return atoi(value);
+}
diff --git a/tools/munin-plugins-busybox/common.h b/tools/munin-plugins-busybox/common.h
index 8db440a9..2a344085 100644
--- a/tools/munin-plugins-busybox/common.h
+++ b/tools/munin-plugins-busybox/common.h
@@ -5,5 +5,6 @@
 
 int writeyes(void);
 int writeno(const char *);
+int getenvint(const char *, int);
 
 #endif
diff --git a/tools/munin-plugins-busybox/load.c b/tools/munin-plugins-busybox/load.c
index 27e18437..ee1491c1 100644
--- a/tools/munin-plugins-busybox/load.c
+++ b/tools/munin-plugins-busybox/load.c
@@ -7,28 +7,18 @@
 
 int load(int argc, char **argv) {
 	FILE *f;
-	int warn, crit;
 	float val;
-	char *s;
 	if(argc > 1) {
 		if(!strcmp(argv[1], "config")) {
-			s = getenv("load_warn");
-			if(s)
-				warn = atoi(s);
-			else
-				warn = 10;
-			s = getenv("load_crit");
-			if(s)
-				crit = atoi(s);
-			else
-				crit = 120;
 			puts("graph_title Load average\n"
 				"graph_args --base 1000 -l 0\n"
 				"graph_vlabel load\n"
 				"graph_scale no\n"
 				"graph_category system\n"
 				"load.label load");
-			printf("load.warning %d\nload.critical %d\n", warn, crit);
+			printf("load.warning %d\nload.critical %d\n",
+					getenvint("load_warn", 10),
+					getenvint("load_crit", 120));
 			return 0;
 		}
 		if(!strcmp(argv[1], "autoconf"))