3 files changed, 12 insertions, 0 deletions
diff --git a/libgfortran/runtime/environ.c b/libgfortran/runtime/environ.c
index 8c09391..a29785b 100644
--- a/libgfortran/runtime/environ.c
+++ b/libgfortran/runtime/environ.c
@@ -28,6 +28,10 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 #include <stdlib.h>
 #include <ctype.h>
 
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
 
 /* Environment scanner.  Examine the environment for controlling minor
  * aspects of the program's execution.  Our philosophy here that the
diff --git a/libgfortran/runtime/pause.c b/libgfortran/runtime/pause.c
index ad69c95..f193314 100644
--- a/libgfortran/runtime/pause.c
+++ b/libgfortran/runtime/pause.c
@@ -25,7 +25,11 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 
 #include "libgfortran.h"
 #include <string.h>
+
+#ifdef HAVE_UNISTD_H
 #include <unistd.h>
+#endif
+
 
 static void
 do_pause (void)
diff --git a/libgfortran/runtime/stop.c b/libgfortran/runtime/stop.c
index 1f0f453..4805412 100644
--- a/libgfortran/runtime/stop.c
+++ b/libgfortran/runtime/stop.c
@@ -26,7 +26,11 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 #include "libgfortran.h"
 #include <stdlib.h>
 #include <string.h>
+
+#ifdef HAVE_UNISTD_H
 #include <unistd.h>
+#endif
+
 
 /* A numeric STOP statement.  */