diff --git a/simon-simd.cpp b/simon-simd.cpp
index b9c4e337..00b451f8 100644
--- a/simon-simd.cpp
+++ b/simon-simd.cpp
@@ -17,12 +17,6 @@
 // #undef CRYPTOPP_SSE41_AVAILABLE
 // #undef CRYPTOPP_ARM_NEON_AVAILABLE
 
-// Disable NEON/ASIMD for Cortex-A53 and A57. The shifts are too slow and C/C++ is 3 cpb
-// faster than NEON/ASIMD. Also see http://github.com/weidai11/cryptopp/issues/367.
-#if (defined(__aarch32__) || defined(__aarch64__)) && defined(CRYPTOPP_SLOW_ARMV8_SHIFT)
-# undef CRYPTOPP_ARM_NEON_AVAILABLE
-#endif
-
 #if (CRYPTOPP_ARM_NEON_AVAILABLE)
 # include <arm_neon.h>
 #endif
diff --git a/simon.cpp b/simon.cpp
index 4e9f8856..b2918f6c 100644
--- a/simon.cpp
+++ b/simon.cpp
@@ -13,12 +13,6 @@
 // #undef CRYPTOPP_SSE41_AVAILABLE
 // #undef CRYPTOPP_ARM_NEON_AVAILABLE
 
-// Disable NEON/ASIMD for Cortex-A53 and A57. The shifts are too slow and C/C++ is about
-// 3 cpb faster than NEON/ASIMD. Also see http://github.com/weidai11/cryptopp/issues/367.
-#if (defined(__aarch32__) || defined(__aarch64__)) && defined(CRYPTOPP_SLOW_ARMV8_SHIFT)
-# undef CRYPTOPP_ARM_NEON_AVAILABLE
-#endif
-
 ANONYMOUS_NAMESPACE_BEGIN
 
 using CryptoPP::word32;
diff --git a/speck-simd.cpp b/speck-simd.cpp
index e23d6aec..c187681e 100644
--- a/speck-simd.cpp
+++ b/speck-simd.cpp
@@ -17,12 +17,6 @@
 // #undef CRYPTOPP_SSE41_AVAILABLE
 // #undef CRYPTOPP_ARM_NEON_AVAILABLE
 
-// Disable NEON/ASIMD for Cortex-A53 and A57. The shifts are too slow and C/C++ is 3 cpb
-// faster than NEON/ASIMD. Also see http://github.com/weidai11/cryptopp/issues/367.
-#if (defined(__aarch32__) || defined(__aarch64__)) && defined(CRYPTOPP_SLOW_ARMV8_SHIFT)
-# undef CRYPTOPP_ARM_NEON_AVAILABLE
-#endif
-
 #if (CRYPTOPP_ARM_NEON_AVAILABLE)
 # include <arm_neon.h>
 #endif
diff --git a/speck.cpp b/speck.cpp
index 9979a317..135f80c0 100644
--- a/speck.cpp
+++ b/speck.cpp
@@ -13,12 +13,6 @@
 // #undef CRYPTOPP_SSE41_AVAILABLE
 // #undef CRYPTOPP_ARM_NEON_AVAILABLE
 
-// Disable NEON/ASIMD for Cortex-A53 and A57. The shifts are too slow and C/C++ is about
-// 3 cpb faster than NEON/ASIMD. Also see http://github.com/weidai11/cryptopp/issues/367.
-#if (defined(__aarch32__) || defined(__aarch64__)) && defined(CRYPTOPP_SLOW_ARMV8_SHIFT)
-# undef CRYPTOPP_ARM_NEON_AVAILABLE
-#endif
-
 ANONYMOUS_NAMESPACE_BEGIN
 
 using CryptoPP::word32;