diff --git a/src/control/C4Record.cpp b/src/control/C4Record.cpp
index ce26d9752..6bb861c79 100644
--- a/src/control/C4Record.cpp
+++ b/src/control/C4Record.cpp
@@ -989,6 +989,7 @@ const char * GetRecordChunkTypeName(C4RecordChunkType eType)
 	case RCT_MenuAddC: return "MenuAddC";  // add menu item: Following commands
 	case RCT_OCF: return "OCF";  // OCF setting of updating
 	case RCT_DirectExec: return "DirectExec";  // a DirectExec-script
+	case RCT_Definition: return "Definition";  // Definition callback
 
 	case RCT_Custom: return "Custom"; // varies
 
diff --git a/src/control/C4Record.h b/src/control/C4Record.h
index 7e61cd19f..573b9a423 100644
--- a/src/control/C4Record.h
+++ b/src/control/C4Record.h
@@ -92,6 +92,7 @@ enum C4RecordChunkType // record file chunk type
 	RCT_MenuAddC = 0xA2,  // add menu item: Following commands
 	RCT_OCF      = 0xA3,  // OCF setting of updating
 	RCT_DirectExec = 0xA4,  // a DirectExec-script
+	RCT_Definition = 0xA5,  // Definition callback
 
 	RCT_Custom  = 0xc0, // varies
 
diff --git a/src/game/object/C4DefList.cpp b/src/game/object/C4DefList.cpp
index b9016f3d6..da89bce46 100644
--- a/src/game/object/C4DefList.cpp
+++ b/src/game/object/C4DefList.cpp
@@ -33,6 +33,10 @@
 #include <C4GameVersion.h>
 #include <C4Language.h>
 
+#ifdef DEBUGREC
+#include <C4Record.h>
+#endif
+
 C4DefList::C4DefList()
 {
 	Default();
@@ -442,6 +446,13 @@ void C4DefList::CallEveryDefinition()
 {
 	for (Table::iterator it = table.begin(); it != table.end(); ++it)
 	{
+#ifdef DEBUGREC
+		// TODO: Might not be synchronous on runtime join since is run by joining
+		// client but not by host. Might need to go to Synchronize().
+		char sz[32+1];
+		strncpy(sz, it->second->GetName(), 32+1);
+		AddDbgRec(RCT_Definition, sz, 32);
+#endif
 		C4AulParSet Pars(C4VPropList(it->second));
 		it->second->Script.Call(PSF_Definition, 0, &Pars, true);
 		it->second->Freeze();