diff --git a/fuzzers/libfuzzer_libpng/Cargo.toml b/fuzzers/libfuzzer_libpng/Cargo.toml
index 126ba381d9..58481f0fcf 100644
--- a/fuzzers/libfuzzer_libpng/Cargo.toml
+++ b/fuzzers/libfuzzer_libpng/Cargo.toml
@@ -8,11 +8,11 @@ edition = "2018"
 default = ["std"]
 std = []
 
-#[profile.release]
-#lto = true
-#codegen-units = 1
-#opt-level = 3
-#debug = true
+[profile.release]
+lto = true
+codegen-units = 1
+opt-level = 3
+debug = true
 
 [build-dependencies]
 cc = { version = "1.0", features = ["parallel"] }