diff --git a/objdiff-core/src/arch/arm.rs b/objdiff-core/src/arch/arm.rs
index f2c5afd..e14c17b 100644
--- a/objdiff-core/src/arch/arm.rs
+++ b/objdiff-core/src/arch/arm.rs
@@ -54,6 +54,9 @@ impl ObjArch for ObjArchArm {
         let mut code = &section.data
             [symbol.section_address as usize..(symbol.section_address + symbol.size) as usize];
 
+        let line_info =
+            obj.line_info.as_ref().and_then(|map| map.get(&SectionIndex(section.orig_index)));
+
         let start_addr = symbol.address as u32;
         let end_addr = start_addr + symbol.size as u32;
 
@@ -93,10 +96,8 @@ impl ObjArch for ObjArchArm {
                 break;
             }
 
-            let line = obj
-                .line_info
-                .as_ref()
-                .and_then(|map| map.range(..=cur_addr as u64).last().map(|(_, &b)| b));
+            let line =
+                line_info.and_then(|map| map.range(..=cur_addr as u64).last().map(|(_, &b)| b));
 
             let ins = match mapping {
                 MappingSymbol::Arm => {