diff --git a/libretro-common/net/net_socket.c b/libretro-common/net/net_socket.c
index 6e906b6e4c..3b3e9ebfbe 100644
--- a/libretro-common/net/net_socket.c
+++ b/libretro-common/net/net_socket.c
@@ -126,11 +126,11 @@ int socket_receive_all_blocking(int fd, void *data_, size_t size)
 bool socket_set_block(int fd, bool block)
 {
 #if defined(__CELLOS_LV2__) || defined(VITA) || defined(WIIU)
-   int i = block;
+   int i = !block;
    setsockopt(fd, SOL_SOCKET, SO_NBIO, &i, sizeof(int));
    return true;
 #elif defined(_WIN32)
-   u_long mode = block;
+   u_long mode = !block;
    return ioctlsocket(fd, FIONBIO, &mode) == 0;
 #else
    return fcntl(fd, F_SETFL, (fcntl(fd, F_GETFL) & ~O_NONBLOCK) | (block ? 0 : O_NONBLOCK)) == 0;