diff --git a/lualib-src/lua-crypt.c b/lualib-src/lua-crypt.c
index 5d2f12f9..01f9ac0a 100644
--- a/lualib-src/lua-crypt.c
+++ b/lualib-src/lua-crypt.c
@@ -589,11 +589,11 @@ read64(lua_State *L, uint32_t xx[2], uint32_t yy[2]) {
 	size_t sz = 0;
 	const uint8_t *x = (const uint8_t *)luaL_checklstring(L, 1, &sz);
 	if (sz != 8) {
-		luaL_error(L, "Invalid hmac x");
+		luaL_error(L, "Invalid uint64 x");
 	}
 	const uint8_t *y = (const uint8_t *)luaL_checklstring(L, 2, &sz);
 	if (sz != 8) {
-		luaL_error(L, "Invalid hmac y");
+		luaL_error(L, "Invalid uint64 y");
 	}
 	xx[0] = x[0] | x[1]<<8 | x[2]<<16 | x[3]<<24;
 	xx[1] = x[4] | x[5]<<8 | x[6]<<16 | x[7]<<24;
@@ -703,7 +703,7 @@ ldhexchange(lua_State *L) {
 	size_t sz = 0;
 	const uint8_t *x = (const uint8_t *)luaL_checklstring(L, 1, &sz);
 	if (sz != 8) {
-		luaL_error(L, "Invalid hmac x");
+		luaL_error(L, "Invalid dh uint64 key");
 	}
 	uint32_t xx[2];
 	xx[0] = x[0] | x[1]<<8 | x[2]<<16 | x[3]<<24;