diff --git a/src/generate/cs_members.rs b/src/generate/cs_members.rs
index cc8fb6de9..5cfd97f3b 100644
--- a/src/generate/cs_members.rs
+++ b/src/generate/cs_members.rs
@@ -11,6 +11,7 @@ use super::cs_type_tag::CsTypeTag;
 #[derive(Debug, Eq, Hash, PartialEq, Clone, Default, PartialOrd, Ord)]
 pub struct CsGenericTemplate {
     pub names: Vec<(CsGenericTemplateType, String)>,
+    pub indices: Vec<u16>
 }
 
 #[derive(Debug, Eq, Hash, PartialEq, Clone, Default, PartialOrd, Ord)]
@@ -21,20 +22,22 @@ pub enum CsGenericTemplateType {
 }
 
 impl CsGenericTemplate {
-    pub fn make_typenames(names: impl Iterator<Item = String>) -> Self {
+    pub fn make_typenames(names: impl Iterator<Item = String>, indices: impl Iterator<Item = u16>) -> Self {
         CsGenericTemplate {
             names: names
                 .into_iter()
                 .map(|s| (CsGenericTemplateType::AnyType, s))
                 .collect(),
+            indices: indices.collect()
         }
     }
-    pub fn make_ref_types(names: impl Iterator<Item = String>) -> Self {
+    pub fn make_ref_types(names: impl Iterator<Item = String>, indices: impl Iterator<Item = u16>) -> Self {
         CsGenericTemplate {
             names: names
                 .into_iter()
                 .map(|s| (CsGenericTemplateType::ReferenceType, s))
                 .collect(),
+            indices: indices.collect()
         }
     }
 
diff --git a/src/generate/cs_type.rs b/src/generate/cs_type.rs
index 13bff2401..49fa51b2f 100644
--- a/src/generate/cs_type.rs
+++ b/src/generate/cs_type.rs
@@ -7,7 +7,7 @@ use byteorder::ReadBytesExt;
 
 use brocolib::{
     global_metadata::{
-        FieldIndex, Il2CppFieldDefinition, Il2CppTypeDefinition, MethodIndex, ParameterIndex,
+        FieldIndex, Il2CppFieldDefinition, Il2CppTypeDefinition, Il2CppGenericContainer, MethodIndex, ParameterIndex,
         TypeDefinitionIndex,
     },
     runtime_metadata::{Il2CppMethodSpec, Il2CppType, Il2CppTypeEnum, TypeData},
@@ -168,6 +168,11 @@ impl CsType {
         self
     }
 
+    fn make_generic_arg_indices(container: &Il2CppGenericContainer) -> impl Iterator<Item = u16> {
+        let start = container.generic_parameter_start.index() as u16;
+        return start..start+(container.type_argc as u16);
+    }
+
     pub fn make_cs_type(
         metadata: &CordlMetadata,
         tdi: TypeDefinitionIndex,
@@ -195,6 +200,7 @@ impl CsType {
         let cpp_template = generics.as_ref().map(|g| {
             CsGenericTemplate::make_typenames(
                 g.iter().map(|g| g.name(metadata.metadata).to_string()),
+                Self::make_generic_arg_indices(t.generic_container(metadata.metadata))
             )
         });
 
@@ -718,16 +724,19 @@ impl CsType {
             .generic_container_index
             .is_valid()
             .then(|| match generic_inst.is_some() {
-                true => Some(CsGenericTemplate { names: vec![] }),
+                true => Some(CsGenericTemplate { names: vec![], indices: vec![] }),
                 false => {
-                    let generics = method
-                        .generic_container(metadata.metadata)
-                        .unwrap()
+                    let container = method.generic_container(metadata.metadata).unwrap();
+                    let generics = container
                         .generic_parameters(metadata.metadata)
                         .iter()
                         .map(|param| param.name(metadata.metadata).to_string());
 
-                    Some(CsGenericTemplate::make_typenames(generics))
+
+                    Some(CsGenericTemplate::make_typenames(
+                        generics,
+                        Self::make_generic_arg_indices(container)
+                    ))
                 }
             })
             .flatten();
diff --git a/src/generate/json/json_gen.rs b/src/generate/json/json_gen.rs
index 10cbcce24..aa42bc4e5 100644
--- a/src/generate/json/json_gen.rs
+++ b/src/generate/json/json_gen.rs
@@ -86,7 +86,14 @@ pub enum JsonGenericArgumentType {
     ReferenceType,
 }
 
-type JsonTemplate = Vec<(JsonGenericArgumentType, String)>;
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct JsonGenericArgument {
+    pub r#type: JsonGenericArgumentType,
+    pub index: u16, // generic argument index
+    pub name: String,
+}
+
+type JsonTemplate = Vec<JsonGenericArgument>;
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct JsonMethod {
@@ -180,19 +187,18 @@ fn make_param(param: &CsParam, name_resolver: &JsonNameResolver) -> JsonParam {
 }
 
 fn make_template(template: &CsGenericTemplate) -> JsonTemplate {
-    // note: I'm not good at rust so there may be a better way to do this - zip
-    // (feel free to remove this comment if this is fine)
-    return template
-        .names
+    return template.names
         .iter()
-        .map(|p| {
-            (
-                match (p.0) {
+        .zip(template.indices.iter())
+        .map(|((ty, name), index)| {
+            JsonGenericArgument {
+                r#type: match ty {
                     CsGenericTemplateType::AnyType => JsonGenericArgumentType::AnyType,
                     CsGenericTemplateType::ReferenceType => JsonGenericArgumentType::ReferenceType,
                 },
-                p.1.clone(),
-            )
+                name: name.clone(),
+                index: *index
+            }
         })
         .collect_vec();
 }