diff --git a/org_mode_samples/lesser_element/lesser_block/example/switches_with_label.org b/org_mode_samples/lesser_element/lesser_block/example/switches_with_label.org
new file mode 100644
index 00000000..e844b0e9
--- /dev/null
+++ b/org_mode_samples/lesser_element/lesser_block/example/switches_with_label.org
@@ -0,0 +1,3 @@
+#+BEGIN_SRC elisp -n -r -l "((%s))"
+foo
+#+END_SRC
diff --git a/src/parser/lesser_block.rs b/src/parser/lesser_block.rs
index 77515e3b..da6c1458 100644
--- a/src/parser/lesser_block.rs
+++ b/src/parser/lesser_block.rs
@@ -342,9 +342,10 @@ fn example_switches<'s>(input: OrgSource<'s>) -> Res<OrgSource<'s>, ExampleSwitc
             (SwitchState::Normal, "-n") => SwitchState::NewLineNumber,
             (SwitchState::Normal, "+n") => SwitchState::ContinuedLineNumber,
             (SwitchState::NewLineNumber, _) => {
-                let val = word
-                    .parse::<LineNumber>()
-                    .expect("TODO: I should be able to return CustomError from nom parsers.");
+                let val = match word.parse::<LineNumber>() {
+                    Ok(val) => val,
+                    Err(_) => 1,
+                };
                 if val < 0 {
                     number_lines = Some(SwitchNumberLines::New(0));
                 } else {
@@ -354,9 +355,10 @@ fn example_switches<'s>(input: OrgSource<'s>) -> Res<OrgSource<'s>, ExampleSwitc
                 SwitchState::Normal
             }
             (SwitchState::ContinuedLineNumber, _) => {
-                let val = word
-                    .parse::<LineNumber>()
-                    .expect("TODO: I should be able to return CustomError from nom parsers.");
+                let val = match word.parse::<LineNumber>() {
+                    Ok(val) => val,
+                    Err(_) => 1,
+                };
                 if val < 0 {
                     number_lines = Some(SwitchNumberLines::Continued(0));
                 } else {