diff --git a/GNUmakefile b/GNUmakefile
index 61b24b90..0ca01f64 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -159,7 +159,7 @@ $(ANDROID_TARGETS): LDFLAGS += --sysroot $(ANDROID_NDK)/toolchains/llvm/prebuilt
 $(DEBUG_TARGETS): CFLAGS += -DDEBUG -Og
 $(RELEASE_TARGETS): CFLAGS += -DNDEBUG
 $(NONANDROID_RELEASE_TARGETS): CFLAGS += -O3
-$(ANDROID_RELEASE_TARGETS): CFLAGS += -Os
+$(ANDROID_RELEASE_TARGETS): CFLAGS += -Oz
 $(WINDOWS_TARGETS): CC = x86_64-w64-mingw32-gcc-win32
 $(WINDOWS_TARGETS): AS = $(CC)
 $(WINDOWS_TARGETS): CFLAGS += \