diff --git a/options/m_property.c b/options/m_property.c
index 0d870bd81c..fa91fd1162 100644
--- a/options/m_property.c
+++ b/options/m_property.c
@@ -352,11 +352,11 @@ void m_properties_print_help_list(struct mp_log *log,
     mp_info(log, "\nTotal: %d properties\n", count);
 }
 
-int m_property_bool_ro(int action, void* arg, int var)
+int m_property_bool_ro(int action, void* arg, bool var)
 {
     switch (action) {
     case M_PROPERTY_GET:
-        *(int *)arg = !!var;
+        *(bool *)arg = !!var;
         return M_PROPERTY_OK;
     case M_PROPERTY_GET_TYPE:
         *(struct m_option *)arg = (struct m_option){.type = CONF_TYPE_BOOL};
diff --git a/options/m_property.h b/options/m_property.h
index 0f5b4bc2cf..7e84abc8d7 100644
--- a/options/m_property.h
+++ b/options/m_property.h
@@ -176,7 +176,7 @@ char* m_properties_expand_string(const struct m_property *prop_list,
                                  const char *str, void *ctx);
 
 // Trivial helpers for implementing properties.
-int m_property_bool_ro(int action, void* arg, int var);
+int m_property_bool_ro(int action, void* arg, bool var);
 int m_property_int_ro(int action, void* arg, int var);
 int m_property_int64_ro(int action, void* arg, int64_t var);
 int m_property_float_ro(int action, void* arg, float var);