diff --git a/src/machine/m_at.c b/src/machine/m_at.c
index 15b828676..162006803 100644
--- a/src/machine/m_at.c
+++ b/src/machine/m_at.c
@@ -332,6 +332,7 @@ machine_at_ibmxt286_init(const machine_t *model)
     return ret;
 }
 
+int
 machine_at_pb286_init(const machine_t *model)
 {
     int ret;