diff --git a/dlls/ws2_32/socket.c b/dlls/ws2_32/socket.c
index 402cb7762fc..ab0c81b311a 100644
--- a/dlls/ws2_32/socket.c
+++ b/dlls/ws2_32/socket.c
@@ -1779,6 +1779,12 @@ int WINAPI getsockopt( SOCKET s, int level, int optname, char *optval, int *optl
             return server_getsockopt( s, IOCTL_AFD_WINE_GET_IP_RECVTOS, optval, optlen );
 
         case IP_RECVTTL:
+            if (*optlen < sizeof(DWORD) || !optval)
+            {
+                *optlen = 0;
+                SetLastError( WSAEFAULT );
+                return SOCKET_ERROR;
+            }
             return server_getsockopt( s, IOCTL_AFD_WINE_GET_IP_RECVTTL, optval, optlen );
 
         case IP_TOS:
@@ -3100,6 +3106,11 @@ int WINAPI setsockopt( SOCKET s, int level, int optname, const char *optval, int
             return server_setsockopt( s, IOCTL_AFD_WINE_SET_IP_RECVTOS, optval, optlen );
 
         case IP_RECVTTL:
+            if (optlen < sizeof(DWORD) || !optval)
+            {
+                SetLastError( WSAEFAULT );
+                return SOCKET_ERROR;
+            }
             return server_setsockopt( s, IOCTL_AFD_WINE_SET_IP_RECVTTL, optval, optlen );
 
         case IP_TOS:
diff --git a/dlls/ws2_32/tests/sock.c b/dlls/ws2_32/tests/sock.c
index 98c806d6a8a..ea1f939c5f3 100644
--- a/dlls/ws2_32/tests/sock.c
+++ b/dlls/ws2_32/tests/sock.c
@@ -1186,6 +1186,7 @@ static void test_set_getsockopt(void)
         {AF_INET, SOCK_DGRAM, IPPROTO_IP, IP_MULTICAST_TTL, TRUE, {1, 1, 4}, {0}, FALSE},
         {AF_INET, SOCK_DGRAM, IPPROTO_IP, IP_PKTINFO, FALSE, {0, 0, 4}, {0}, TRUE, TRUE},
         {AF_INET, SOCK_DGRAM, IPPROTO_IP, IP_RECVTOS, FALSE, {0, 0, 4}, {0}, TRUE, TRUE},
+        {AF_INET, SOCK_DGRAM, IPPROTO_IP, IP_RECVTTL, FALSE, {0, 0, 4}, {0}, TRUE, TRUE},
         {AF_INET, SOCK_DGRAM, IPPROTO_IP, IP_TOS, TRUE, {1, 1, 4}, {0}, FALSE},
         {AF_INET, SOCK_DGRAM, IPPROTO_IP, IP_TTL, TRUE, {1, 1, 4}, {0}, FALSE},
     };