diff --git a/compressed_archive/unarr/unarr.pro b/compressed_archive/unarr/unarr.pro
index 9b53b714..d23c3c19 100644
--- a/compressed_archive/unarr/unarr.pro
+++ b/compressed_archive/unarr/unarr.pro
@@ -2,7 +2,7 @@ INCLUDEPATH += $$PWD/unarr-master/
 DEPENDPATH += $$PWD/unarr-master/
 
 unix:QMAKE_CFLAGS_RELEASE -= "-O2"
-unix:QMAKE_CFLAGS += "-O3"
+unix:QMAKE_CFLAGS_RELEASE += "-O3"
 unix:QMAKE_CFLAGS_RELEASE += "-DNDEBUG"
 unix:QMAKE_CFLAGS += "-D_FILE_OFFSET_BITS=64"