diff --git a/include/shared.h b/include/shared.h
index 5d9a497ee..852c48342 100644
--- a/include/shared.h
+++ b/include/shared.h
@@ -15,6 +15,12 @@
 #include <ctype.h>
 #include <math.h>
 
+#if defined (_WIN)
+#include <winsock2.h> // needed for select()
+#else
+#include <sys/select.h>
+#endif
+
 bool overflow_check_u32_add (const u32 a, const u32 b);
 bool overflow_check_u32_mul (const u32 a, const u32 b);
 bool overflow_check_u64_add (const u64 a, const u64 b);
diff --git a/src/Makefile b/src/Makefile
index a023733c0..1a870cb54 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -262,6 +262,7 @@ LFLAGS_NATIVE           := $(LFLAGS)
 LFLAGS_NATIVE           += -Wl,--dynamicbase -Wl,--nxcompat
 LFLAGS_NATIVE           += -lpsapi
 LFLAGS_NATIVE           += -liconv
+LFLAGS_NATIVE           += -lws2_32
 endif # MSYS2
 
 ##
@@ -299,9 +300,11 @@ LFLAGS_CROSS_LINUX64    += -lm
 LFLAGS_CROSS_WIN32      := $(LFLAGS)
 LFLAGS_CROSS_WIN32      += -Wl,--dynamicbase -Wl,--nxcompat
 LFLAGS_CROSS_WIN32      += -lpsapi
+LFLAGS_CROSS_WIN32      += -lws2_32
 LFLAGS_CROSS_WIN64      := $(LFLAGS)
 LFLAGS_CROSS_WIN64      += -Wl,--dynamicbase -Wl,--nxcompat
 LFLAGS_CROSS_WIN64      += -lpsapi
+LFLAGS_CROSS_WIN64      += -lws2_32
 
 CFLAGS_REMOVE_LZMA        := -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef