4 files changed, 4 insertions, 4 deletions
diff --git a/idlc/source/preproc/include.c b/idlc/source/preproc/include.c
index d79b04084a8a..e00156b13bcb 100644
--- a/idlc/source/preproc/include.c
+++ b/idlc/source/preproc/include.c
@@ -25,7 +25,7 @@
  * for a copy of the LGPLv3 License.
  *
  ************************************************************************/
-#if (defined(_WIN32) || defined(_MSDOS) || defined(__IBMC__))
+#if (defined(_WIN32) || defined(__IBMC__))
 #   include <io.h>
 #else
 #   include <unistd.h>
diff --git a/idlc/source/preproc/lex.c b/idlc/source/preproc/lex.c
index 4b565b9c133f..7e1892a169dd 100644
--- a/idlc/source/preproc/lex.c
+++ b/idlc/source/preproc/lex.c
@@ -28,7 +28,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#if (defined(_WIN32) || defined(_MSDOS) || defined(__IBMC__))
+#if (defined(_WIN32) || defined(__IBMC__))
 #include <io.h>
 #else
 #include <unistd.h>
diff --git a/idlc/source/preproc/tokens.c b/idlc/source/preproc/tokens.c
index e119fc5cc2b8..b554226f9cf4 100644
--- a/idlc/source/preproc/tokens.c
+++ b/idlc/source/preproc/tokens.c
@@ -29,7 +29,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <ctype.h>
-#if (defined(_WIN32) || defined(_MSDOS) || defined(__IBMC__))
+#if (defined(_WIN32) || defined(__IBMC__))
 #include <io.h>
 #else
 #include <unistd.h>
diff --git a/idlc/source/preproc/unix.c b/idlc/source/preproc/unix.c
index 57b49a74128a..56a97b973d98 100644
--- a/idlc/source/preproc/unix.c
+++ b/idlc/source/preproc/unix.c
@@ -31,7 +31,7 @@
 #include <string.h>
 #include <ctype.h>
 #include <fcntl.h>
-#if (defined(_WIN32) || defined(_MSDOS) || defined(__IBMC__))
+#if (defined(_WIN32) || defined(__IBMC__))
 #include <io.h>
 #include <sys/stat.h>
 #include <external/glibc/getopt.h>