diff --git a/crc-simd.cpp b/crc-simd.cpp
index f1f61288..10eb206c 100644
--- a/crc-simd.cpp
+++ b/crc-simd.cpp
@@ -15,6 +15,13 @@
 # undef CRYPTOPP_ARM_CRC32_AVAILABLE
 #endif
 
+#if defined(__linux__)
+# include <sys/auxv.h>
+# ifndef HWCAP_CRC32
+# define HWCAP_CRC32 (1 << 7)
+# endif
+#endif
+
 #if (CRYPTOPP_SSE42_AVAILABLE)
 # include "nmmintrin.h"
 #endif
@@ -71,6 +78,11 @@ bool CPU_TryCRC32_ARMV8()
     }
     return result;
 #else
+#   if defined(__linux__)
+	if (getauxval(AT_HWCAP) & HWCAP_CRC32)
+		return true;
+#   endif
+
     // longjmp and clobber warnings. Volatile is required.
     // http://github.com/weidai11/cryptopp/issues/24 and http://stackoverflow.com/q/7721854
     volatile bool result = true;
diff --git a/gcm-simd.cpp b/gcm-simd.cpp
index 366597a4..78b4ebbe 100644
--- a/gcm-simd.cpp
+++ b/gcm-simd.cpp
@@ -15,6 +15,13 @@
 # undef CRYPTOPP_ARM_PMULL_AVAILABLE
 #endif
 
+#if defined(__linux__)
+# include <sys/auxv.h>
+# ifndef HWCAP_PMULL
+# define HWCAP_PMULL (1 << 4)
+# endif
+#endif
+
 #if (CRYPTOPP_CLMUL_AVAILABLE)
 # include "tmmintrin.h"
 # include "wmmintrin.h"
@@ -204,6 +211,11 @@ bool CPU_TryPMULL_ARMV8()
     }
     return result;
 # else
+#   if defined(__linux__)
+	if (getauxval(AT_HWCAP) & HWCAP_PMULL)
+		return true;
+#   endif
+
     // longjmp and clobber warnings. Volatile is required.
     // http://github.com/weidai11/cryptopp/issues/24 and http://stackoverflow.com/q/7721854
     volatile bool result = true;
diff --git a/neon.cpp b/neon.cpp
index 0b55e464..6b155ecb 100644
--- a/neon.cpp
+++ b/neon.cpp
@@ -9,6 +9,13 @@
 #include "pch.h"
 #include "config.h"
 
+#if defined(__linux__)
+# include <sys/auxv.h>
+# ifndef HWCAP_ASIMD
+# define HWCAP_ASIMD (1 << 1)
+# endif
+#endif
+
 #if (CRYPTOPP_ARM_NEON_AVAILABLE)
 # include "arm_neon.h"
 #endif
@@ -63,6 +70,11 @@ bool CPU_TryNEON_ARM()
 	}
 	return result;
 # else
+#   if defined(__linux__) && (defined(__aarch32__) || defined(__aarch64__))
+	if (getauxval(AT_HWCAP) & HWCAP_ASIMD)
+		return true;
+#   endif
+
 	// longjmp and clobber warnings. Volatile is required.
 	// http://github.com/weidai11/cryptopp/issues/24 and http://stackoverflow.com/q/7721854
 	volatile bool result = true;
diff --git a/rijndael-simd.cpp b/rijndael-simd.cpp
index 9f577473..871f6095 100644
--- a/rijndael-simd.cpp
+++ b/rijndael-simd.cpp
@@ -20,6 +20,13 @@
 # undef CRYPTOPP_ARM_AES_AVAILABLE
 #endif
 
+#if defined(__linux__)
+# include <sys/auxv.h>
+# ifndef HWCAP_AES
+# define HWCAP_AES (1 << 3)
+# endif
+#endif
+
 #if (CRYPTOPP_SSE41_AVAILABLE)
 // Hack... Apple conflates SSE4.1 and SSE4.2. Without __SSE4_2__,
 //   Apple fails the compile with "SSE4.2 instruction set not enabled"
@@ -94,6 +101,11 @@ bool CPU_TryAES_ARMV8()
 	}
 	return result;
 # else
+#   if defined(__linux__)
+	if (getauxval(AT_HWCAP) & HWCAP_AES)
+		return true;
+#   endif
+
 	// longjmp and clobber warnings. Volatile is required.
 	// http://github.com/weidai11/cryptopp/issues/24 and http://stackoverflow.com/q/7721854
 	volatile bool result = true;
diff --git a/sha-simd.cpp b/sha-simd.cpp
index a7377bed..7b8368a5 100644
--- a/sha-simd.cpp
+++ b/sha-simd.cpp
@@ -15,6 +15,16 @@
 # undef CRYPTOPP_ARM_SHA_AVAILABLE
 #endif
 
+#if defined(__linux__)
+# include <sys/auxv.h>
+# ifndef HWCAP_SHA1
+# define HWCAP_SHA1 (1 << 5)
+# endif
+# ifndef HWCAP_SHA2
+# define HWCAP_SHA2 (1 << 6)
+# endif
+#endif
+
 #if (CRYPTOPP_SSE42_AVAILABLE)
 # include "nmmintrin.h"
 #endif
@@ -75,6 +85,11 @@ bool CPU_TrySHA1_ARMV8()
 	}
 	return result;
 # else
+#   if defined(__linux__)
+	if (getauxval(AT_HWCAP) & HWCAP_SHA1)
+		return true;
+#   endif
+
 	// longjmp and clobber warnings. Volatile is required.
 	// http://github.com/weidai11/cryptopp/issues/24 and http://stackoverflow.com/q/7721854
 	volatile bool result = true;
@@ -133,6 +148,11 @@ bool CPU_TrySHA2_ARMV8()
 	}
 	return result;
 #else
+#   if defined(__linux__)
+	if (getauxval(AT_HWCAP) & HWCAP_SHA2)
+		return true;
+#   endif
+
 	// longjmp and clobber warnings. Volatile is required.
 	// http://github.com/weidai11/cryptopp/issues/24 and http://stackoverflow.com/q/7721854
 	volatile bool result = true;