diff --git a/java/jni/Application.mk b/java/jni/Application.mk
index 5f68ef6e1..2a7897870 100644
--- a/java/jni/Application.mk
+++ b/java/jni/Application.mk
@@ -1,5 +1,5 @@
 NDK_TOOLCHAIN_VERSION := clang
 APP_STL := c++_static
-APP_CPPFLAGS := -O0 -fPIC -fPIE -fvectorize -Wall -fstack-protector -fexceptions -fno-strict-aliasing
+APP_CPPFLAGS := -O3 -fPIC -fPIE -fvectorize -Wall -fstack-protector -fexceptions -fno-strict-aliasing -DZT_NO_TYPE_PUNNING=1
 APP_PLATFORM := android-14
 APP_ABI := all