diff --git a/cc/lto.go b/cc/lto.go
index 44441527a..f3af7d278 100644
--- a/cc/lto.go
+++ b/cc/lto.go
@@ -110,7 +110,7 @@ func (lto *lto) flags(ctx ModuleContext, flags Flags) Flags {
 		var ltoLdFlags []string
 
 		// Do not perform costly LTO optimizations for Eng builds.
-		if Bool(lto.Properties.Lto_O0) || ctx.Config().Eng() {
+		if Bool(lto.Properties.Lto_O0) || ctx.optimizeForSize() || ctx.Config().Eng() {
 			ltoLdFlags = append(ltoLdFlags, "-Wl,--lto-O0")
 		}