diff --git a/crates/compiler/fmt/src/expr.rs b/crates/compiler/fmt/src/expr.rs
index b9f354cab9..8d0e6875b8 100644
--- a/crates/compiler/fmt/src/expr.rs
+++ b/crates/compiler/fmt/src/expr.rs
@@ -291,7 +291,7 @@ fn format_expr_only(
                 let inner_parens = if needs_parens {
                     Parens::NotNeeded
                 } else {
-                    Parens::InApply
+                    Parens::InApplyLastArg
                 };
 
                 if !before_all_newlines {
diff --git a/crates/compiler/test_syntax/tests/snapshots/pass/not_closure_with_multibackpassing.expr.formatted.roc b/crates/compiler/test_syntax/tests/snapshots/pass/not_closure_with_multibackpassing.expr.formatted.roc
new file mode 100644
index 0000000000..91c0d95b9e
--- /dev/null
+++ b/crates/compiler/test_syntax/tests/snapshots/pass/not_closure_with_multibackpassing.expr.formatted.roc
@@ -0,0 +1,3 @@
+!\t ->
+    m, i <- 0
+    s
\ No newline at end of file
diff --git a/crates/compiler/test_syntax/tests/snapshots/pass/not_closure_with_multibackpassing.expr.result-ast b/crates/compiler/test_syntax/tests/snapshots/pass/not_closure_with_multibackpassing.expr.result-ast
new file mode 100644
index 0000000000..173ead48e1
--- /dev/null
+++ b/crates/compiler/test_syntax/tests/snapshots/pass/not_closure_with_multibackpassing.expr.result-ast
@@ -0,0 +1,42 @@
+@0-16 SpaceAfter(
+    UnaryOp(
+        @1-16 Closure(
+            [
+                @2-3 Identifier {
+                    ident: "t",
+                },
+            ],
+            @7-16 SpaceBefore(
+                Backpassing(
+                    [
+                        @7-8 Identifier {
+                            ident: "m",
+                        },
+                        @9-10 Identifier {
+                            ident: "i",
+                        },
+                    ],
+                    @12-13 Num(
+                        "0",
+                    ),
+                    @15-16 SpaceBefore(
+                        Var {
+                            module_name: "",
+                            ident: "s",
+                        },
+                        [
+                            Newline,
+                        ],
+                    ),
+                ),
+                [
+                    Newline,
+                ],
+            ),
+        ),
+        @0-1 Not,
+    ),
+    [
+        Newline,
+    ],
+)
diff --git a/crates/compiler/test_syntax/tests/snapshots/pass/not_closure_with_multibackpassing.expr.roc b/crates/compiler/test_syntax/tests/snapshots/pass/not_closure_with_multibackpassing.expr.roc
new file mode 100644
index 0000000000..f0e9650a37
--- /dev/null
+++ b/crates/compiler/test_syntax/tests/snapshots/pass/not_closure_with_multibackpassing.expr.roc
@@ -0,0 +1,3 @@
+!\t->
+ m,i<-0
+ s
diff --git a/crates/compiler/test_syntax/tests/test_snapshots.rs b/crates/compiler/test_syntax/tests/test_snapshots.rs
index 4ef013174e..3b95476692 100644
--- a/crates/compiler/test_syntax/tests/test_snapshots.rs
+++ b/crates/compiler/test_syntax/tests/test_snapshots.rs
@@ -551,6 +551,7 @@ mod test_snapshots {
         pass/nonempty_hosted_header.header,
         pass/nonempty_package_header.header,
         pass/nonempty_platform_header.header,
+        pass/not_closure_with_multibackpassing.expr,
         pass/not_double_parens.expr,
         pass/not_multiline_string.expr,
         pass/not_record_updater.expr,