diff --git a/libs/freetdm/src/dsp/bell202.c b/libs/freetdm/src/dsp/bell202.c
index 7401a7f219..7f8faf536d 100644
--- a/libs/freetdm/src/dsp/bell202.c
+++ b/libs/freetdm/src/dsp/bell202.c
@@ -36,9 +36,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#ifndef _MSC_VER
-#include <unistd.h>
-#endif
 #include <errno.h>
 #include <math.h>
 
diff --git a/libs/freetdm/src/dsp/uart.c b/libs/freetdm/src/dsp/uart.c
index 67050e8316..cbd81b2236 100644
--- a/libs/freetdm/src/dsp/uart.c
+++ b/libs/freetdm/src/dsp/uart.c
@@ -35,9 +35,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#ifndef _MSC_VER
-#include <unistd.h>
-#endif
 #include <errno.h>
 
 #include "uart.h"