diff --git a/ChangeLog.adoc b/ChangeLog.adoc
index 7341e03b3..03cb9273e 100644
--- a/ChangeLog.adoc
+++ b/ChangeLog.adoc
@@ -14,6 +14,7 @@
 [[v4.3.1_fixed]]
 === Fixed
 
+* tcl: fix return value for hdata_longlong (issue #2119)
 * tests: fix relay tests on s390x
 * tests: fix check of php plugin
 * tests: fix compilation of tests on Fedora 40 and Rocky 9.4
diff --git a/src/plugins/tcl/weechat-tcl-api.c b/src/plugins/tcl/weechat-tcl-api.c
index 487ad5d97..6bef61433 100644
--- a/src/plugins/tcl/weechat-tcl-api.c
+++ b/src/plugins/tcl/weechat-tcl-api.c
@@ -125,6 +125,11 @@
         Tcl_SetObjResult (interp, Tcl_NewLongObj (__long));             \
         return TCL_OK;                                                  \
     }
+#define API_RETURN_LONGLONG(__longlong)                                 \
+    {                                                                   \
+        Tcl_SetObjResult (interp, Tcl_NewWideIntObj (__longlong));      \
+        return TCL_OK;                                                  \
+    }
 #define API_RETURN_OBJ(__obj)                                           \
     {                                                                   \
         Tcl_SetObjResult (interp, __obj);                               \
@@ -5368,7 +5373,7 @@ API_FUNC(hdata_longlong)
                                      API_STR2PTR(pointer),
                                      name);
 
-    API_RETURN_LONG(result);
+    API_RETURN_LONGLONG(result);
 }
 
 API_FUNC(hdata_string)