diff --git a/app/plug-in/gimpgpparams.c b/app/plug-in/gimpgpparams.c
index 35356d1392..c98aed55e8 100644
--- a/app/plug-in/gimpgpparams.c
+++ b/app/plug-in/gimpgpparams.c
@@ -104,6 +104,13 @@ _gimp_gp_param_def_to_param_spec (gpointer    gimp,
                                       param_def->meta.m_int.default_val,
                                       flags);
 
+      if (! strcmp (param_def->type_name, "GParamUInt"))
+        return g_param_spec_uint (name, nick, blurb,
+                                  param_def->meta.m_int.min_val,
+                                  param_def->meta.m_int.max_val,
+                                  param_def->meta.m_int.default_val,
+                                  flags);
+
       if (! strcmp (param_def->type_name, "GimpParamInt8"))
         return gimp_param_spec_int8 (name, nick, blurb,
                                      param_def->meta.m_int.min_val,
diff --git a/libgimp/gimpgpparams-body.c b/libgimp/gimpgpparams-body.c
index c0e726376f..00da2b1faa 100644
--- a/libgimp/gimpgpparams-body.c
+++ b/libgimp/gimpgpparams-body.c
@@ -51,7 +51,8 @@ _gimp_param_spec_to_gp_param_def (GParamSpec *pspec,
       param_def->meta.m_int.max_val     = ispec->maximum;
       param_def->meta.m_int.default_val = ispec->default_value;
     }
-  else if (pspec_type == GIMP_TYPE_PARAM_INT8)
+  else if (pspec_type == G_TYPE_PARAM_UINT ||
+           pspec_type == GIMP_TYPE_PARAM_INT8)
     {
       GParamSpecUInt *uspec = G_PARAM_SPEC_UINT (pspec);
 
diff --git a/libgimp/gimpgpparams.c b/libgimp/gimpgpparams.c
index 51f814e312..21dee89fae 100644
--- a/libgimp/gimpgpparams.c
+++ b/libgimp/gimpgpparams.c
@@ -95,6 +95,13 @@ _gimp_gp_param_def_to_param_spec (gpointer    gimp,
                                       param_def->meta.m_int.default_val,
                                       flags);
 
+      if (! strcmp (param_def->type_name, "GParamUInt"))
+        return g_param_spec_uint (name, nick, blurb,
+                                  param_def->meta.m_int.min_val,
+                                  param_def->meta.m_int.max_val,
+                                  param_def->meta.m_int.default_val,
+                                  flags);
+
       if (! strcmp (param_def->type_name, "GimpParamInt8"))
         return gimp_param_spec_int8 (name, nick, blurb,
                                      param_def->meta.m_int.min_val,