diff --git a/src/lib/ecore/ecore_animator.eo b/src/lib/ecore/ecore_animator.eo
index eb0e183134..35ededef69 100644
--- a/src/lib/ecore/ecore_animator.eo
+++ b/src/lib/ecore/ecore_animator.eo
@@ -1,3 +1,6 @@
+type @extern Ecore_Timeline_Cb: __undefined_type;
+type @extern Ecore_Task_Cb: __undefined_type;
+
 class Ecore.Animator (Eo.Base)
 {
    eo_prefix: ecore_animator;
diff --git a/src/lib/ecore/ecore_idle_enterer.eo b/src/lib/ecore/ecore_idle_enterer.eo
index 4f975ed08a..aef93a4ca9 100644
--- a/src/lib/ecore/ecore_idle_enterer.eo
+++ b/src/lib/ecore/ecore_idle_enterer.eo
@@ -1,3 +1,5 @@
+type @extern Ecore_Task_Cb: __undefined_type;
+
 class Ecore.Idle.Enterer (Eo.Base)
 {
    eo_prefix: ecore_idle_enterer;
diff --git a/src/lib/ecore/ecore_idle_exiter.eo b/src/lib/ecore/ecore_idle_exiter.eo
index 8e79177630..33982ac313 100644
--- a/src/lib/ecore/ecore_idle_exiter.eo
+++ b/src/lib/ecore/ecore_idle_exiter.eo
@@ -1,3 +1,5 @@
+type @extern Ecore_Task_Cb: __undefined_type;
+
 class Ecore.Idle.Exiter (Eo.Base)
 {
    eo_prefix: ecore_idle_exiter;
diff --git a/src/lib/ecore/ecore_idler.eo b/src/lib/ecore/ecore_idler.eo
index 56ae81199c..948189b067 100644
--- a/src/lib/ecore/ecore_idler.eo
+++ b/src/lib/ecore/ecore_idler.eo
@@ -1,3 +1,5 @@
+type @extern Ecore_Task_Cb: __undefined_type;
+
 class Ecore.Idler (Eo.Base)
 {
    eo_prefix: ecore_idler;
diff --git a/src/lib/ecore/ecore_job.eo b/src/lib/ecore/ecore_job.eo
index e9c4cd89b7..0c232f6302 100644
--- a/src/lib/ecore/ecore_job.eo
+++ b/src/lib/ecore/ecore_job.eo
@@ -1,3 +1,5 @@
+type @extern Ecore_Cb: __undefined_type;
+
 class Ecore.Job (Eo.Base)
 {
    eo_prefix: ecore_job;
diff --git a/src/lib/ecore/ecore_mainloop.eo b/src/lib/ecore/ecore_mainloop.eo
index 5568f7cf9d..37eeaeebed 100644
--- a/src/lib/ecore/ecore_mainloop.eo
+++ b/src/lib/ecore/ecore_mainloop.eo
@@ -1,3 +1,5 @@
+type @extern Ecore_Select_Function: __undefined_type;
+
 class Ecore_Mainloop (Eo.Base)
 {
    legacy_prefix: null;
diff --git a/src/lib/ecore/ecore_poller.eo b/src/lib/ecore/ecore_poller.eo
index 92fb30f96c..4dad5845ad 100644
--- a/src/lib/ecore/ecore_poller.eo
+++ b/src/lib/ecore/ecore_poller.eo
@@ -1,3 +1,5 @@
+type @extern Ecore_Task_Cb: __undefined_type;
+
 class Ecore.Poller (Eo.Base)
 {
    methods {
diff --git a/src/lib/ecore/ecore_timer.eo b/src/lib/ecore/ecore_timer.eo
index b1cfee19b9..da89b86efc 100644
--- a/src/lib/ecore/ecore_timer.eo
+++ b/src/lib/ecore/ecore_timer.eo
@@ -1,3 +1,5 @@
+type @extern Ecore_Task_Cb: __undefined_type;
+
 class Ecore.Timer (Eo.Base)
 {
    [[Timers are objects that will call a given callback at some point