diff --git a/Makefile b/Makefile
index 2d577767..e2216003 100644
--- a/Makefile
+++ b/Makefile
@@ -129,7 +129,7 @@ EXT = so
 VERSION_EXT = $(EXT).$(API_MAJOR)
 AR_EXT = a
 $(LIBNAME)_LDFLAGS += -Wl,-Bsymbolic-functions,-soname,lib$(LIBNAME).$(VERSION_EXT)
-# UNICORN_CFLAGS += -fvisibility=hidden
+UNICORN_CFLAGS += -fvisibility=hidden
 endif
 endif
 endif