diff --git a/external/cecil b/external/cecil
index a6c8f5e10..cb6c1ca9a 160000
--- a/external/cecil
+++ b/external/cecil
@@ -1 +1 @@
-Subproject commit a6c8f5e1070d25c38cbfaa415d6f6853e5236687
+Subproject commit cb6c1ca9aaef869841bfc3e2e7407b81b979b875
diff --git a/src/Java.Interop.Tools.Cecil/Java.Interop.Tools.Cecil/MethodDefinitionRocks.cs b/src/Java.Interop.Tools.Cecil/Java.Interop.Tools.Cecil/MethodDefinitionRocks.cs
index 623e2f2ea..1b7d461fc 100644
--- a/src/Java.Interop.Tools.Cecil/Java.Interop.Tools.Cecil/MethodDefinitionRocks.cs
+++ b/src/Java.Interop.Tools.Cecil/Java.Interop.Tools.Cecil/MethodDefinitionRocks.cs
@@ -110,7 +110,7 @@ static bool IsParameterCompatibleWith (TypeReference a, TypeReference b)
 					return true;
 				var gpa = (GenericParameter) a;
 				foreach (var c in gpa.Constraints) {
-					if (!c.IsAssignableFrom (b))
+					if (!c.ConstraintType.IsAssignableFrom (b))
 						return false;
 				}
 				return true;
diff --git a/tools/generator/Java.Interop.Tools.Generator.ObjectModel/GenericParameterDefinition.cs b/tools/generator/Java.Interop.Tools.Generator.ObjectModel/GenericParameterDefinition.cs
index f4912b563..b68aebf3f 100644
--- a/tools/generator/Java.Interop.Tools.Generator.ObjectModel/GenericParameterDefinition.cs
+++ b/tools/generator/Java.Interop.Tools.Generator.ObjectModel/GenericParameterDefinition.cs
@@ -72,7 +72,7 @@ public static GenericParameterDefinitionList FromMetadata (IEnumerable<GenericPa
 				ret.Add (new GenericParameterDefinition (
 					p.FullNameCorrected (),
 					(from a in p.Constraints
-					 select a.FullNameCorrected ()).ToArray ()));
+					 select a.ConstraintType.FullNameCorrected ()).ToArray ()));
 			}
 			return ret;
 		}