diff --git a/.gitignore b/.gitignore
index f0319283..f4c22351 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,6 +7,7 @@
 .devel
 .test
 *.o
+*.so
 *.dll
 *.Rout
 .RData
diff --git a/DESCRIPTION b/DESCRIPTION
index 8b75dea9..7de24a5a 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,5 +1,5 @@
 Package: parallelly
-Version: 1.37.0-9000
+Version: 1.37.0-9001
 Title: Enhancing the 'parallel' Package
 Imports:
     parallel,
diff --git a/src/parallelly.so b/src/parallelly.so
deleted file mode 100755
index f0c6eab3..00000000
Binary files a/src/parallelly.so and /dev/null differ
diff --git a/src/test_tcp_port.c b/src/test_tcp_port.c
index f82e1edf..d79e6051 100644
--- a/src/test_tcp_port.c
+++ b/src/test_tcp_port.c
@@ -5,6 +5,7 @@
 #ifdef _WIN32
 #include <winsock2.h>
 #else
+#include <sys/socket.h>  /* socket(), listen(), bind(), AF_INET, ... */
 #include <netinet/in.h>
 #endif