diff --git a/sys/vm/vm_page.c b/sys/vm/vm_page.c
--- a/sys/vm/vm_page.c
+++ b/sys/vm/vm_page.c
@@ -287,19 +287,32 @@
 		return (0);
 	}
 
-	/*
-	 * If there's no end pointer then the buffer is coming from
-	 * the kenv and we know it's null-terminated.
-	 */
-	if (end == NULL)
+	/* Ensure that strtoq() won't walk off the end */
+	if (end == NULL) {
+		/*
+		 * If there's no end pointer then the buffer is coming from
+		 * the kenv and we know it's null-terminated.
+		 */
 		end = *list + strlen(*list);
+	} else {
+		/*
+		 * If there is and end pointer then the buffer is not null-
+		 * terminated. The pointer is after the end of the buffer, so
+		 * we need to change the last char inside the buffer to \0 if
+		 * we can.
+		 */
+		end--;
 
-	/* Ensure that strtoq() won't walk off the end */
-	if (*end != '\0') {
-		if (*end == '\n' || *end == ' ' || *end  == ',')
+		switch (*end) {
+		case '\n':
+		case ' ':
+		case ',':
 			*end = '\0';
-		else {
-			printf("Blacklist not terminated, skipping\n");
+			/* FALLTHROUGH */
+		case '\0':
+			break;
+		default:
+			printf("Blacklist not terminated by '\\n', ' ' or ',', skipping\n");
 			*list = NULL;
 			return (0);
 		}