diff --git a/src/if_python.c b/src/if_python.c
index 4f028e5..43c8992 100644
--- a/src/if_python.c
+++ b/src/if_python.c
@@ -861,7 +861,7 @@
 #endif
 
     void
-python_end()
+python_end(void)
 {
     static int recurse = 0;
 
@@ -899,7 +899,7 @@
 
 #if (defined(DYNAMIC_PYTHON) && defined(FEAT_PYTHON3)) || defined(PROTO)
     int
-python_loaded()
+python_loaded(void)
 {
     return (hinstPython != 0);
 }