diff --git a/source/arm/crc64_arm.c b/source/arm/crc64_arm.c
index 4adf0ce..c3378df 100644
--- a/source/arm/crc64_arm.c
+++ b/source/arm/crc64_arm.c
@@ -160,8 +160,7 @@ uint64_t aws_checksums_crc64xz_arm_pmull(const uint8_t *input, int length, const
         }
 
         // Fold 32 bytes down to 16 bytes by multiplying by x^192 and x^128 constants
-        a1 = xor3_p64(b1,
-                      (x128, a1), pmull_hi(x128, a1));
+        a1 = xor3_p64(b1, pmull_lo(x128, a1), pmull_hi(x128, a1));
     }
 
     if (length & 16) {