diff --git a/cli/src/repl.rs b/cli/src/repl.rs
index fdc928e727..d95ebe26dc 100644
--- a/cli/src/repl.rs
+++ b/cli/src/repl.rs
@@ -258,7 +258,6 @@ pub fn gen(src: &[u8], target: Triple, opt_level: OptLevel) -> Result<(String, S
         problems: &mut mono_problems,
         home,
         ident_ids: &mut ident_ids,
-        jump_counter: arena.alloc(0),
     };
 
     let main_body = roc_mono::expr::Expr::new(&mut mono_env, loc_expr.value, &mut procs);
diff --git a/compiler/build/src/program.rs b/compiler/build/src/program.rs
index a3e7dd409a..aa7887b7a5 100644
--- a/compiler/build/src/program.rs
+++ b/compiler/build/src/program.rs
@@ -169,7 +169,6 @@ pub fn gen(
         problems: &mut mono_problems,
         home,
         ident_ids: &mut ident_ids,
-        jump_counter: arena.alloc(0),
     };
 
     // Add modules' decls to Procs
diff --git a/compiler/gen/tests/helpers/eval.rs b/compiler/gen/tests/helpers/eval.rs
index 4a06795266..0885361f8a 100644
--- a/compiler/gen/tests/helpers/eval.rs
+++ b/compiler/gen/tests/helpers/eval.rs
@@ -70,7 +70,6 @@ macro_rules! assert_llvm_evals_to {
             problems: &mut mono_problems,
             home,
             ident_ids: &mut ident_ids,
-            jump_counter: arena.alloc(0),
         };
 
         let main_body = Expr::new(&mut mono_env, loc_expr.value, &mut procs);
@@ -255,7 +254,6 @@ macro_rules! assert_opt_evals_to {
             problems: &mut mono_problems,
             home,
             ident_ids: &mut ident_ids,
-            jump_counter: arena.alloc(0),
         };
         let main_body = Expr::new(&mut mono_env, loc_expr.value, &mut procs);
 
diff --git a/compiler/mono/src/decision_tree.rs b/compiler/mono/src/decision_tree.rs
index c423118104..ce135e5c45 100644
--- a/compiler/mono/src/decision_tree.rs
+++ b/compiler/mono/src/decision_tree.rs
@@ -910,9 +910,6 @@ pub fn optimize_when<'a>(
         &jumps,
     );
 
-    // increase the jump counter by the number of jumps in this branching structure
-    *env.jump_counter += jumps.len() as u64;
-
     Expr::Store(stores, env.arena.alloc(expr))
 }
 
diff --git a/compiler/mono/src/expr.rs b/compiler/mono/src/expr.rs
index df694a8008..cc49771813 100644
--- a/compiler/mono/src/expr.rs
+++ b/compiler/mono/src/expr.rs
@@ -252,7 +252,6 @@ pub struct Env<'a, 'i> {
     pub problems: &'i mut std::vec::Vec<MonoProblem>,
     pub home: ModuleId,
     pub ident_ids: &'i mut IdentIds,
-    pub jump_counter: &'a mut u64,
 }
 
 impl<'a, 'i> Env<'a, 'i> {
diff --git a/compiler/mono/tests/test_mono.rs b/compiler/mono/tests/test_mono.rs
index 5584fb0bae..438f5ec535 100644
--- a/compiler/mono/tests/test_mono.rs
+++ b/compiler/mono/tests/test_mono.rs
@@ -58,7 +58,6 @@ mod test_mono {
             problems: &mut mono_problems,
             home,
             ident_ids: &mut ident_ids,
-            jump_counter: arena.alloc(0),
         };
         let mono_expr = Expr::new(&mut mono_env, loc_expr.value, &mut procs);
         let procs =
diff --git a/compiler/reporting/tests/test_reporting.rs b/compiler/reporting/tests/test_reporting.rs
index 7c7d55b27f..f9887083ca 100644
--- a/compiler/reporting/tests/test_reporting.rs
+++ b/compiler/reporting/tests/test_reporting.rs
@@ -93,7 +93,6 @@ mod test_reporting {
                 problems: &mut mono_problems,
                 home,
                 ident_ids: &mut ident_ids,
-                jump_counter: arena.alloc(0),
             };
             let _mono_expr = Expr::new(&mut mono_env, loc_expr.value, &mut procs);
         }