diff --git a/src/ciphers/aes/aes_desc.c b/src/ciphers/aes/aes_desc.c
index 61d9f7b7..1c08c713 100644
--- a/src/ciphers/aes/aes_desc.c
+++ b/src/ciphers/aes/aes_desc.c
@@ -15,7 +15,7 @@
 #define LTC_S_X86_CPUID
 static LTC_INLINE void s_x86_cpuid(int* regs, int leaf)
 {
-#if defined _MSC_VER
+#if defined(_MSC_VER) && !defined(__clang__) // MSVC but not ClangCL
    __cpuid(regs, leaf);
 #else
    int a, b, c, d;
diff --git a/src/encauth/gcm/gcm_gf_mult.c b/src/encauth/gcm/gcm_gf_mult.c
index fb694a73..1053071b 100644
--- a/src/encauth/gcm/gcm_gf_mult.c
+++ b/src/encauth/gcm/gcm_gf_mult.c
@@ -33,7 +33,7 @@
 #define LTC_S_X86_CPUID
 static LTC_INLINE void s_x86_cpuid(int* regs, int leaf)
 {
-#if defined _MSC_VER
+#if defined(_MSC_VER) && !defined(__clang__) // MSVC but not ClangCL
    __cpuid(regs, leaf);
 #else
    int a, b, c, d;
diff --git a/src/hashes/sha1_desc.c b/src/hashes/sha1_desc.c
index 56e73135..9eaad262 100644
--- a/src/hashes/sha1_desc.c
+++ b/src/hashes/sha1_desc.c
@@ -28,7 +28,7 @@ const struct ltc_hash_descriptor sha1_desc =
 #define LTC_S_X86_CPUID
 static LTC_INLINE void s_x86_cpuid(int* regs, int leaf)
 {
-#if defined _MSC_VER
+#if defined(_MSC_VER) && !defined(__clang__) // MSVC but not ClangCL
    __cpuid(regs, leaf);
 #else
     int a, b, c, d;
diff --git a/src/hashes/sha2/sha224_desc.c b/src/hashes/sha2/sha224_desc.c
index abdd5507..3269ff98 100644
--- a/src/hashes/sha2/sha224_desc.c
+++ b/src/hashes/sha2/sha224_desc.c
@@ -33,7 +33,7 @@ const struct ltc_hash_descriptor sha224_desc =
 #define LTC_S_X86_CPUID
 static LTC_INLINE void s_x86_cpuid(int* regs, int leaf)
 {
-#if defined _MSC_VER
+#if defined(_MSC_VER) && !defined(__clang__) // MSVC but not ClangCL
    __cpuid(regs, leaf);
 #else
     int a, b, c, d;
diff --git a/src/hashes/sha2/sha256_desc.c b/src/hashes/sha2/sha256_desc.c
index f3cecc33..02b9b0aa 100644
--- a/src/hashes/sha2/sha256_desc.c
+++ b/src/hashes/sha2/sha256_desc.c
@@ -8,7 +8,7 @@
 #define LTC_S_X86_CPUID
 static LTC_INLINE void s_x86_cpuid(int* regs, int leaf)
 {
-#if defined _MSC_VER
+#if defined(_MSC_VER) && !defined(__clang__) // MSVC but not ClangCL
    __cpuid(regs, leaf);
 #else
     int a, b, c, d;