diff --git a/nac3core/src/codegen/model/function.rs b/nac3core/src/codegen/model/function.rs
index 62e9f25f..715002a0 100644
--- a/nac3core/src/codegen/model/function.rs
+++ b/nac3core/src/codegen/model/function.rs
@@ -35,19 +35,19 @@ struct Arg<'ctx> {
 /// If `my_function_name` has not been declared in `ctx.module`, once `.returning()` is called, a function
 /// declaration of `my_function_name` is added to `ctx.module`, where the [`FunctionType`] is deduced from
 /// the argument types and returning type.
-pub struct FnCall<'ctx, 'a, 'b, 'c, 'd, G: CodeGenerator + ?Sized> {
-    generator: &'d mut G,
+pub struct FnCall<'ctx, 'a, 'b, G: CodeGenerator + ?Sized> {
+    generator: &'b mut G,
     ctx: &'b CodeGenContext<'ctx, 'a>,
     /// Function name
-    name: &'c str,
+    name: &'b str,
     /// Call arguments
     args: Vec<Arg<'ctx>>,
     /// LLVM function Attributes
     attrs: Vec<&'static str>,
 }
 
-impl<'ctx, 'a, 'b, 'c, 'd, G: CodeGenerator + ?Sized> FnCall<'ctx, 'a, 'b, 'c, 'd, G> {
-    pub fn begin(generator: &'d mut G, ctx: &'b CodeGenContext<'ctx, 'a>, name: &'c str) -> Self {
+impl<'ctx, 'a, 'b, G: CodeGenerator + ?Sized> FnCall<'ctx, 'a, 'b, G> {
+    pub fn begin(generator: &'b mut G, ctx: &'b CodeGenContext<'ctx, 'a>, name: &'b str) -> Self {
         FnCall { generator, ctx, name, args: Vec::new(), attrs: Vec::new() }
     }