diff --git a/DroidFishApp/src/main/cpp/stockfish/Android.mk b/DroidFishApp/src/main/cpp/stockfish/Android.mk
index d1d1b38..5bac77c 100644
--- a/DroidFishApp/src/main/cpp/stockfish/Android.mk
+++ b/DroidFishApp/src/main/cpp/stockfish/Android.mk
@@ -7,7 +7,7 @@ SF_SRC_FILES := \
 
 MY_ARCH_DEF :=
 ifeq ($(TARGET_ARCH_ABI),arm64-v8a)
-  MY_ARCH_DEF += -DIS_64BIT
+  MY_ARCH_DEF += -DIS_64BIT -DUSE_POPCNT
 endif
 ifeq ($(TARGET_ARCH_ABI),x86_64)
   MY_ARCH_DEF += -DIS_64BIT