diff --git a/m-funcobj.h b/m-funcobj.h
index f523611c..5cf454d2 100644
--- a/m-funcobj.h
+++ b/m-funcobj.h
@@ -311,7 +311,7 @@
                       )                                                       \
   {                                                                           \
     /* Let's go through an uintptr_t to avoid [broken] aliasing detection by compiler */ \
-    uintptr_t __self = (uintptr_t) _self;				      \
+    uintptr_t __self = (uintptr_t) _self;                                     \
     struct M_C(name, _s) *self = (struct M_C(name, _s) *)(void*)__self;       \
     (void) self; /* maybe unused */                                           \
     callback_core;                                                            \