diff --git a/AssemblyData/methodsrewriter/ResolverUtils.cs b/AssemblyData/methodsrewriter/ResolverUtils.cs
index 59a3b5a0..43659cf5 100644
--- a/AssemblyData/methodsrewriter/ResolverUtils.cs
+++ b/AssemblyData/methodsrewriter/ResolverUtils.cs
@@ -146,7 +146,7 @@ namespace AssemblyData.methodsrewriter {
 
 			var asmRef = DotNetUtils.getAssemblyNameReference(b);
 			var asmName = a.Assembly.GetName();
-			if (asmRef.Name != asmName.Name)
+			if (asmRef == null || asmRef.Name != asmName.Name)
 				return false;
 
 			return compareTypes(a.DeclaringType, b.DeclaringType);
diff --git a/blocks/DotNetUtils.cs b/blocks/DotNetUtils.cs
index 98868692..0c310b86 100644
--- a/blocks/DotNetUtils.cs
+++ b/blocks/DotNetUtils.cs
@@ -926,6 +926,9 @@ namespace de4dot.blocks {
 
 		public static AssemblyNameReference getAssemblyNameReference(TypeReference type) {
 			var scope = type.Scope;
+			if (scope == null)
+				return null;
+
 			if (scope is ModuleDefinition) {
 				var moduleDefinition = (ModuleDefinition)scope;
 				return moduleDefinition.Assembly.Name;
@@ -946,7 +949,7 @@ namespace de4dot.blocks {
 
 		public static string getFullAssemblyName(TypeReference type) {
 			var asmRef = getAssemblyNameReference(type);
-			return asmRef.FullName;
+			return asmRef == null ? null : asmRef.FullName;
 		}
 
 		public static bool isAssembly(IMetadataScope scope, string assemblySimpleName) {
diff --git a/de4dot.code/ExternalAssemblies.cs b/de4dot.code/ExternalAssemblies.cs
index 3913f491..8c29764b 100644
--- a/de4dot.code/ExternalAssemblies.cs
+++ b/de4dot.code/ExternalAssemblies.cs
@@ -56,6 +56,8 @@ namespace de4dot.code {
 
 		ExternalAssembly load(TypeReference type) {
 			var asmFullName = DotNetUtils.getFullAssemblyName(type);
+			if (asmFullName == null)
+				return null;
 			ExternalAssembly asm;
 			if (assemblies.TryGetValue(asmFullName, out asm))
 				return asm;
diff --git a/de4dot.code/renamer/asmmodules/Modules.cs b/de4dot.code/renamer/asmmodules/Modules.cs
index 8550f9e5..9cc0bd1d 100644
--- a/de4dot.code/renamer/asmmodules/Modules.cs
+++ b/de4dot.code/renamer/asmmodules/Modules.cs
@@ -390,6 +390,8 @@ namespace de4dot.code.renamer.asmmodules {
 		// Returns null if it's a non-loaded module/assembly
 		IEnumerable<Module> findModules(TypeReference type) {
 			var scope = type.Scope;
+			if (scope == null)
+				return null;
 
 			if (scope is AssemblyNameReference)
 				return findModules((AssemblyNameReference)scope);