diff --git a/src-self-hosted/Module.zig b/src-self-hosted/Module.zig
index 4b564da4eb..87b69d6117 100644
--- a/src-self-hosted/Module.zig
+++ b/src-self-hosted/Module.zig
@@ -176,6 +176,13 @@ pub const Decl = struct {
     /// This is populated regardless of semantic analysis and code generation.
     link: link.File.Elf.TextBlock = link.File.Elf.TextBlock.empty,
 
+    /// Represents the function in the linked output file, if the `Decl` is a function.
+    /// This is stored here and not in `Fn` because `Decl` survives across updates but
+    /// `Fn` does not.
+    /// TODO Look into making `Fn` a longer lived structure and moving this field there
+    /// to save on memory usage.
+    fn_link: link.File.Elf.SrcFn = link.File.Elf.SrcFn.empty,
+
     contents_hash: std.zig.SrcHash,
 
     /// The shallow set of other decls whose typed_value could possibly change if this Decl's
@@ -280,9 +287,6 @@ pub const Fn = struct {
     },
     owner_decl: *Decl,
 
-    /// Represents the function in the linked output file.
-    link: link.File.Elf.SrcFn = link.File.Elf.SrcFn.empty,
-
     /// This memory is temporary and points to stack memory for the duration
     /// of Fn analysis.
     pub const Analysis = struct {
diff --git a/src-self-hosted/link.zig b/src-self-hosted/link.zig
index bd572019c0..012a44d757 100644
--- a/src-self-hosted/link.zig
+++ b/src-self-hosted/link.zig
@@ -1922,7 +1922,7 @@ pub const File = struct {
                 // Now we have the full contents and may allocate a region to store it.
 
                 const debug_line_sect = &self.sections.items[self.debug_line_section_index.?];
-                const src_fn = &typed_value.val.cast(Value.Payload.Function).?.func.link;
+                const src_fn = &decl.fn_link;
                 if (self.dbg_line_fn_last) |last| {
                     if (src_fn.prev == null and src_fn.next == null) {
                         // Append new function.