diff --git a/src/lib/commands/miss.c b/src/lib/commands/miss.c
index 902fa3e5..aa72b211 100644
--- a/src/lib/commands/miss.c
+++ b/src/lib/commands/miss.c
@@ -61,7 +61,8 @@ mission(void)
     int type;
     int mission;
     coord x, y;
-    int size, desired_radius, radius;
+    size_t size;
+    int desired_radius, radius;
     struct sctstr opsect;
     s_char *block;
     struct genitem *gp;
diff --git a/src/lib/subs/mission.c b/src/lib/subs/mission.c
index bf63b856..e8bc990e 100644
--- a/src/lib/subs/mission.c
+++ b/src/lib/subs/mission.c
@@ -876,7 +876,8 @@ mission_name(short int mission)
 void
 show_mission(int type, struct nstr_item *np)
 {
-    int size, first = 1, radius;
+    size_t size;
+    int first = 1, radius;
     s_char *block;
     struct genitem *gp;