diff --git a/common/array.h b/common/array.h
index b988621fa..a5671fbde 100644
--- a/common/array.h
+++ b/common/array.h
@@ -34,13 +34,6 @@
         int len, size;                                                      \
     } pfx##_array_t;
 
-#define ARRAY_TYPE_EXTRA(type_t, pfx, extra)                                \
-    typedef struct pfx##_array_t {                                          \
-        type_t *tab;                                                        \
-        int len, size;                                                      \
-        extra;                                                              \
-    } pfx##_array_t;
-
 #define foreach(var, array) \
     for(int __foreach_index_##var = 0; \
         __foreach_index_##var < (array).len; \
diff --git a/common/luaclass.c b/common/luaclass.c
index 33c99a801..fa234cdcc 100644
--- a/common/luaclass.c
+++ b/common/luaclass.c
@@ -256,9 +256,6 @@ luaA_class_setup(lua_State *L, lua_class_t *class,
 
     signal_add(&class->signals, "new");
 
-    if (parent)
-        class->signals.inherits_from = &parent->signals;
-
     lua_class_array_append(&luaA_classes, class);
 }
 
diff --git a/common/luaclass.h b/common/luaclass.h
index 8f7314699..a5ed642a1 100644
--- a/common/luaclass.h
+++ b/common/luaclass.h
@@ -123,7 +123,7 @@ luaA_checkudataornil(lua_State *L, int udx, lua_class_t *class)
     static inline int                                                          \
     luaA_##prefix##_class_add_signal(lua_State *L)                             \
     {                                                                          \
-        signal_add(&(lua_class).signals, luaL_checkstring(L, 1));              \
+        luaA_deprecate(L, "signal usage without add_signal()");                \
         return 0;                                                              \
     }                                                                          \
                                                                                \
diff --git a/common/luaobject.c b/common/luaobject.c
index 4f833d4fe..8f55ed0a6 100644
--- a/common/luaobject.c
+++ b/common/luaobject.c
@@ -253,8 +253,7 @@ signal_object_emit(lua_State *L, signal_array_t *arr, const char *name, int narg
             lua_remove(L, - nargs - nbfunc - 1 + i);
             luaA_dofunction(L, nargs, 0);
         }
-    } else
-        luaA_warn(L, "Trying to emit unknown signal '%s'", name);
+    }
 
     /* remove args */
     lua_pop(L, nargs);
@@ -304,9 +303,6 @@ luaA_object_emit_signal(lua_State *L, int oud,
             lua_remove(L, - nargs - nbfunc - 2 + i);
             luaA_dofunction(L, nargs + 1, 0);
         }
-    } else {
-        luaA_warn(L, "Trying to emit unknown signal '%s'", name);
-        return;
     }
 
     /* Then emit signal on the class */
diff --git a/common/luaobject.h b/common/luaobject.h
index c3e1f0560..b57ec43aa 100644
--- a/common/luaobject.h
+++ b/common/luaobject.h
@@ -175,7 +175,6 @@ int luaA_object_emit_signal_simple(lua_State *);
         lua_setmetatable(L, -2);                                               \
         luaA_setuservalue(L, -2);                                              \
         lua_pushvalue(L, -1);                                                  \
-        p->signals.inherits_from = &(lua_class).signals;                       \
         luaA_class_emit_signal(L, &(lua_class), "new", 1);                     \
         return p;                                                              \
     }
diff --git a/common/signal.h b/common/signal.h
index f9a4cc1bb..22dc7cb4a 100644
--- a/common/signal.h
+++ b/common/signal.h
@@ -45,54 +45,18 @@ signal_wipe(signal_t *sig)
     cptr_array_wipe(&sig->sigfuncs);
 }
 
-ARRAY_TYPE_EXTRA(signal_t, signal, struct signal_array_t *inherits_from)
-BARRAY_FUNCS(signal_t, signal, signal_wipe, signal_cmp)
+DO_BARRAY(signal_t, signal, signal_wipe, signal_cmp)
 
 static inline signal_t *
 signal_array_getbyid(signal_array_t *arr, unsigned long id)
 {
     signal_t sig = { .id = id };
-    signal_t *result;
-
-    result = signal_array_lookup(arr, &sig);
-    if(result)
-        return result;
-
-    /* The signal doesn't exist yet. Check if some of our inherits_from have the
-     * signal and if yes, add it.
-     */
-    signal_array_t *inherit = arr->inherits_from;
-    while(inherit != NULL)
-    {
-        if(signal_array_lookup(inherit, &sig))
-            break;
-        inherit = inherit->inherits_from;
-    }
-    if(inherit)
-    {
-        /* Add the signal to this array to pretend it always existed */
-        signal_array_insert(arr, sig);
-        result = signal_array_lookup(arr, &sig);
-        assert(result != NULL);
-    }
-    return result;
+    return signal_array_lookup(arr, &sig);
 }
 
-/** Add a signal to a signal array.
- * Signals have to be added before they can be added or emitted.
- * \param arr The signal array.
- * \param name The signal name.
- */
 static inline void
 signal_add(signal_array_t *arr, const char *name)
 {
-    unsigned long tok = a_strhash((const unsigned char *) name);
-    signal_t *sigfound = signal_array_getbyid(arr, tok);
-    if(!sigfound)
-    {
-        signal_t sig = { .id = tok };
-        signal_array_insert(arr, sig);
-    }
 }
 
 /** Connect a signal inside a signal array.
@@ -109,7 +73,11 @@ signal_connect(signal_array_t *arr, const char *name, const void *ref)
     if(sigfound)
         cptr_array_append(&sigfound->sigfuncs, ref);
     else
-        warn("Trying to connect to unknown signal '%s'", name);
+    {
+        signal_t sig = { .id = tok };
+        cptr_array_append(&sig.sigfuncs, ref);
+        signal_array_insert(arr, sig);
+    }
 }
 
 /** Disconnect a signal inside a signal array.
@@ -131,8 +99,7 @@ signal_disconnect(signal_array_t *arr, const char *name, const void *ref)
                 cptr_array_remove(&sigfound->sigfuncs, func);
                 break;
             }
-    } else
-        warn("Trying to disconnect from unknown signal '%s'", name);
+    }
 }
 
 #endif
diff --git a/spawn.c b/spawn.c
index b289b7f45..b7863e5f1 100644
--- a/spawn.c
+++ b/spawn.c
@@ -112,8 +112,6 @@ spawn_monitor_timeout(gpointer sequence)
              }
              lua_pop(L, 1);
          }
-         else
-             warn("spawn::timeout signal is missing");
     }
     sn_startup_sequence_unref(sequence);
     return FALSE;
@@ -218,8 +216,6 @@ spawn_monitor_event(SnMonitorEvent *event, void *data)
         }
         lua_pop(L, 1);
     }
-    else
-        warn("%s signal is missing", event_type_str);
 }
 
 /** Tell the spawn module that an app has been started.