diff --git a/src/kernel/config.c b/src/kernel/config.c
index 0751c31c2..96ac6d3c6 100644
--- a/src/kernel/config.c
+++ b/src/kernel/config.c
@@ -1057,9 +1057,9 @@ int rule_give(void)
     return config_get_int("rules.give.flags", GIVE_DEFAULT);
 }
 
-int markets_module(void)
+bool markets_module(void)
 {
-    return config_get_int("modules.markets", 0);
+    return (bool)config_get_int("modules.markets", 0);
 }
 
 static struct param *configuration;
diff --git a/src/kernel/config.h b/src/kernel/config.h
index a4a881ce1..dda7873aa 100644
--- a/src/kernel/config.h
+++ b/src/kernel/config.h
@@ -135,7 +135,7 @@ struct param;
 #define GUARD_ALL 0xFFFF
 
     int maxworkingpeasants(const struct region *r);
-    int markets_module(void);
+    bool markets_module(void);
     int wage(const struct region *r, const struct faction *f,
         const struct race *rc, int in_turn);