diff --git a/c/blake3_dispatch.c b/c/blake3_dispatch.c
index 85169d2..2fbf43d 100644
--- a/c/blake3_dispatch.c
+++ b/c/blake3_dispatch.c
@@ -95,8 +95,7 @@ static uint64_t xgetbv() {
 static void cpuid(uint32_t out[4], uint32_t id) {
 #if defined(_MSC_VER)
   __cpuid((int *)out, id);
-#else
-#if defined(__i386__) || defined(_M_IX86)
+#elif defined(__i386__) || defined(_M_IX86)
   __asm__ __volatile__("movl %%ebx, %1\n"
                        "cpuid\n"
                        "xchgl %1, %%ebx\n"
@@ -107,18 +106,21 @@ static void cpuid(uint32_t out[4], uint32_t id) {
                        : "=a"(out[0]), "=b"(out[1]), "=c"(out[2]), "=d"(out[3])
                        : "a"(id));
 #endif
-#endif
 }
 
 static void cpuidex(uint32_t out[4], uint32_t id, uint32_t sid) {
 #if defined(_MSC_VER)
   __cpuidex((int *)out, id, sid);
-#else
+#elif defined(__i386__) || defined(_M_IX86)
   __asm__ __volatile__("movl %%ebx, %1\n"
                        "cpuid\n"
                        "xchgl %1, %%ebx\n"
                        : "=a"(out[0]), "=r"(out[1]), "=c"(out[2]), "=d"(out[3])
                        : "a"(id), "c"(sid));
+#else
+  __asm__ __volatile__("cpuid\n"
+                       : "=a"(out[0]), "=b"(out[1]), "=c"(out[2]), "=d"(out[3])
+                       : "a"(id), "c"(sid));
 #endif
 }