diff --git a/parse.c b/parse.c
index e70ed20..7912212 100644
--- a/parse.c
+++ b/parse.c
@@ -506,6 +506,7 @@
 		if (!is_time && o->is_time)
 			is_time = o->is_time;
 
+		tmp[sizeof(tmp) - 1] = '\0';
 		strncpy(tmp, ptr, sizeof(tmp) - 1);
 		p = strchr(tmp, ',');
 		if (p)
@@ -705,6 +706,7 @@
 		char tmp[128];
 		char *p1, *p2;
 
+		tmp[sizeof(tmp) - 1] = '\0';
 		strncpy(tmp, ptr, sizeof(tmp) - 1);
 
 		/* Handle bsrange with separate read,write values: */