diff --git a/m-protect.h b/m-protect.h
index 066d06c3..4e478bee 100644
--- a/m-protect.h
+++ b/m-protect.h
@@ -274,7 +274,7 @@
   M_C(name, _out_str)(protect_t out, const char str[], const char **e)  \
   {                                                                     \
     m_mutex_lock (out->lock);                                           \
-    bool b = M_CALL_OUT_STR(oplist, out->data, str, e);               \
+    bool b = M_CALL_OUT_STR(oplist, out->data, str, e);                 \
     m_mutex_unlock (out->lock);                                         \
     return b;                                                           \
   }                                                                     \