diff --git a/src/Makefile.am b/src/Makefile.am
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -138,6 +138,7 @@
   compat.h \
   compat/assumptions.h \
   compat/byteswap.h \
+  compat/cpuid.h \
   compat/endian.h \
   compat/sanity.h \
   compat/setenv.h \
diff --git a/src/compat/cpuid.h b/src/compat/cpuid.h
new file mode 100644
--- /dev/null
+++ b/src/compat/cpuid.h
@@ -0,0 +1,26 @@
+// Copyright (c) 2017-2019 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_COMPAT_CPUID_H
+#define BITCOIN_COMPAT_CPUID_H
+
+#if defined(__x86_64__) || defined(__amd64__) || defined(__i386__)
+#define HAVE_GETCPUID
+
+#include <cpuid.h>
+
+// We can't use cpuid.h's __get_cpuid as it does not support subleafs.
+void static inline GetCPUID(uint32_t leaf, uint32_t subleaf, uint32_t &a,
+                            uint32_t &b, uint32_t &c, uint32_t &d) {
+#ifdef __GNUC__
+    __cpuid_count(leaf, subleaf, a, b, c, d);
+#else
+    __asm__("cpuid"
+            : "=a"(a), "=b"(b), "=c"(c), "=d"(d)
+            : "0"(leaf), "2"(subleaf));
+#endif
+}
+
+#endif // defined(__x86_64__) || defined(__amd64__) || defined(__i386__)
+#endif // BITCOIN_COMPAT_CPUID_H
diff --git a/src/crypto/sha256.cpp b/src/crypto/sha256.cpp
--- a/src/crypto/sha256.cpp
+++ b/src/crypto/sha256.cpp
@@ -2,16 +2,17 @@
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
-#include <crypto/common.h>
 #include <crypto/sha256.h>
 
+#include <compat/cpuid.h>
+#include <crypto/common.h>
+
 #include <atomic>
 #include <cassert>
 #include <cstring>
 
 #if defined(__x86_64__) || defined(__amd64__) || defined(__i386__)
 #if defined(USE_ASM)
-#include <cpuid.h>
 namespace sha256_sse4 {
 void Transform(uint32_t *s, const uint8_t *chunk, size_t blocks);
 }
@@ -734,18 +735,6 @@
 
 #if defined(USE_ASM) &&                                                        \
     (defined(__x86_64__) || defined(__amd64__) || defined(__i386__))
-// We can't use cpuid.h's __get_cpuid as it does not support subleafs.
-inline void cpuid(uint32_t leaf, uint32_t subleaf, uint32_t &a, uint32_t &b,
-                  uint32_t &c, uint32_t &d) {
-#ifdef __GNUC__
-    __cpuid_count(leaf, subleaf, a, b, c, d);
-#else
-    __asm__("cpuid"
-            : "=a"(a), "=b"(b), "=c"(c), "=d"(d)
-            : "0"(leaf), "2"(subleaf));
-#endif
-}
-
 /** Check whether the OS has enabled AVX registers. */
 bool AVXEnabled() {
     uint32_t a, d;
@@ -757,8 +746,7 @@
 
 std::string SHA256AutoDetect() {
     std::string ret = "standard";
-#if defined(USE_ASM) &&                                                        \
-    (defined(__x86_64__) || defined(__amd64__) || defined(__i386__))
+#if defined(USE_ASM) && defined(HAVE_GETCPUID)
     bool have_sse4 = false;
     bool have_xsave = false;
     bool have_avx = false;
@@ -775,7 +763,7 @@
     (void)enabled_avx;
 
     uint32_t eax, ebx, ecx, edx;
-    cpuid(1, 0, eax, ebx, ecx, edx);
+    GetCPUID(1, 0, eax, ebx, ecx, edx);
     have_sse4 = (ecx >> 19) & 1;
     have_xsave = (ecx >> 27) & 1;
     have_avx = (ecx >> 28) & 1;
@@ -783,7 +771,7 @@
         enabled_avx = AVXEnabled();
     }
     if (have_sse4) {
-        cpuid(7, 0, eax, ebx, ecx, edx);
+        GetCPUID(7, 0, eax, ebx, ecx, edx);
         have_avx2 = (ebx >> 5) & 1;
         have_shani = (ebx >> 29) & 1;
     }
diff --git a/src/random.cpp b/src/random.cpp
--- a/src/random.cpp
+++ b/src/random.cpp
@@ -9,6 +9,7 @@
 #include <compat.h> // for Windows API
 #include <wincrypt.h>
 #endif
+#include <compat/cpuid.h>
 #include <crypto/sha512.h>
 #include <logging.h> // for LogPrintf()
 #include <randomenv.h>
@@ -48,10 +49,6 @@
 #include <util/strencodings.h> // for ARRAYLEN
 #endif
 
-#if defined(__x86_64__) || defined(__amd64__) || defined(__i386__)
-#include <cpuid.h>
-#endif
-
 [[noreturn]] static void RandFailure() {
     LogPrintf("Failed to read randomness, aborting\n");
     std::abort();
@@ -79,7 +76,7 @@
 #endif
 }
 
-#if defined(__x86_64__) || defined(__amd64__) || defined(__i386__)
+#ifdef HAVE_GETCPUID
 static bool g_rdrand_supported = false;
 static bool g_rdseed_supported = false;
 static constexpr uint32_t CPUID_F1_ECX_RDRAND = 0x40000000;
@@ -92,17 +89,6 @@
 static_assert(CPUID_F7_EBX_RDSEED == bit_RDSEED,
               "Unexpected value for bit_RDSEED");
 #endif
-static void inline GetCPUID(uint32_t leaf, uint32_t subleaf, uint32_t &a,
-                            uint32_t &b, uint32_t &c, uint32_t &d) {
-    // We can't use __get_cpuid as it doesn't support subleafs.
-#ifdef __GNUC__
-    __cpuid_count(leaf, subleaf, a, b, c, d);
-#else
-    __asm__("cpuid"
-            : "=a"(a), "=b"(b), "=c"(c), "=d"(d)
-            : "0"(leaf), "2"(subleaf));
-#endif
-}
 
 static void InitHardwareRand() {
     uint32_t eax, ebx, ecx, edx;