diff --git a/cc/afdo.go b/cc/afdo.go
index 8d8341e..1233e33 100644
--- a/cc/afdo.go
+++ b/cc/afdo.go
@@ -105,6 +105,9 @@
 		// The flags are prepended to allow overriding.
 		profileUseFlag := fmt.Sprintf(afdoFlagsFormat, fdoProfilePath)
 		flags.Local.CFlags = append([]string{profileUseFlag}, flags.Local.CFlags...)
+		// Salvage stale profile by fuzzy matching and use the remapped location for sample profile query.
+		flags.Local.CFlags = append([]string{"-mllvm", "--salvage-stale-profile=true"}, flags.Local.CFlags...)
+		flags.Local.CFlags = append([]string{"-mllvm", "--salvage-stale-profile-max-callsites=2000"}, flags.Local.CFlags...)
 		flags.Local.LdFlags = append([]string{profileUseFlag, "-Wl,-mllvm,-no-warn-sample-unused=true"}, flags.Local.LdFlags...)
 
 		// Update CFlagsDeps and LdFlagsDeps so the module is rebuilt