diff --git a/Source/generator/ClassBase.cs b/Source/generator/ClassBase.cs
index 9cf133d84..67d22a2cb 100644
--- a/Source/generator/ClassBase.cs
+++ b/Source/generator/ClassBase.cs
@@ -115,6 +115,10 @@ namespace GtkSharp.Generation {
 					break;
 
 				case "field":
+					// FIXME Generate callbacks.
+					if (member.GetAttributeAsBoolean ("is_callback"))
+						continue;
+
 					name = member.GetAttribute("name");
 					while (fields.ContainsKey (name))
 						name += "mangled";
diff --git a/Source/generator/StructABIField.cs b/Source/generator/StructABIField.cs
index b7a1b0d0a..224417326 100644
--- a/Source/generator/StructABIField.cs
+++ b/Source/generator/StructABIField.cs
@@ -36,6 +36,9 @@ namespace GtkSharp.Generation {
 		{
 			string cstype = SymbolTable.Table.GetCSType(CType, true);
 
+			if (elem.GetAttributeAsBoolean("is_callback"))
+				return true;
+
 			if (cstype == null || cstype == "") {
 				log.Warn (" field \"" + CName + "\" has no cstype, can't generate ABI field.");