diff --git a/hash.c b/hash.c
index b84bcc7b3d..ce9075895c 100644
--- a/hash.c
+++ b/hash.c
@@ -30,12 +30,12 @@
 #define LSR32(x, n) ((uint32_t)(x) >> (n))
 #define ROR32(x, n) (LSR32(x, n) | LSL32(x, 32 - (n)))
 
-// First 32 bits of the fractional parts of the square roots of the first 8 primes 2..19
+/* First 32 bits of the fractional parts of the square roots of the first 8 primes 2..19 */
 static const uint32_t T_H[8] = {
    0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19,
 };
 
-// First 32 bits of the fractional parts of the cube roots of the first 64 primes 2..311
+/* First 32 bits of the fractional parts of the cube roots of the first 64 primes 2..311 */
 static const uint32_t T_K[64] = {
    0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
    0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,