diff --git a/src/utils/fluid_sys.c b/src/utils/fluid_sys.c
index 1c622ffc..d15d84eb 100644
--- a/src/utils/fluid_sys.c
+++ b/src/utils/fluid_sys.c
@@ -945,7 +945,7 @@ int fluid_server_socket_join(fluid_server_socket_t *server_socket)
   return fluid_thread_join (server_socket->thread);
 }
 
-int fluid_socket_init(void)
+static int fluid_socket_init(void)
 {
 #ifdef _WIN32
   WSADATA wsaData;
@@ -960,14 +960,14 @@ int fluid_socket_init(void)
   return FLUID_OK;
 }
 
-void fluid_socket_cleanup(void)
+static void fluid_socket_cleanup(void)
 {
 #ifdef _WIN32
   WSACleanup();
 #endif
 }
 
-int fluid_socket_get_error(void)
+static int fluid_socket_get_error(void)
 {
 #ifdef _WIN32
   return (int)WSAGetLastError();
diff --git a/src/utils/fluid_sys.h b/src/utils/fluid_sys.h
index 080810c5..d86d17ae 100644
--- a/src/utils/fluid_sys.h
+++ b/src/utils/fluid_sys.h
@@ -354,11 +354,6 @@ void fluid_socket_close(fluid_socket_t sock);
 fluid_istream_t fluid_socket_get_istream(fluid_socket_t sock);
 fluid_ostream_t fluid_socket_get_ostream(fluid_socket_t sock);
 
-int fluid_socket_init(void);
-void fluid_socket_cleanup(void);
-int fluid_socket_get_error(void);
-
-
 
 /* Profiling */