diff --git a/Android.mk b/Android.mk
index f8dcb60..d755d20 100644
--- a/Android.mk
+++ b/Android.mk
@@ -235,6 +235,7 @@
 
 ifeq ($(Q_OR_LATER),1)
 LOCAL_CFLAGS += \
+        -DARMNN_MIXED_PRECISION_FP16_POOLING \
         -DBOOST_NO_AUTO_PTR
 endif # PLATFORM_VERSION == Q or later