diff --git a/doc/bison.1 b/doc/bison.1
index ec8d979a..7ce9d397 100644
--- a/doc/bison.1
+++ b/doc/bison.1
@@ -235,6 +235,7 @@ and exit.
 .B \-h
 .br
 .ns
+.TP
 .B \-\-help
 Print a summary of the options to
 .I bison
diff --git a/src/system.h b/src/system.h
new file mode 100644
index 00000000..8d3562c9
--- /dev/null
+++ b/src/system.h
@@ -0,0 +1,25 @@
+#ifdef MSDOS
+#include <io.h>
+#endif
+
+#if defined(HAVE_STDLIB_H) || defined(MSDOS)
+#include <stdlib.h>
+#endif
+
+#if (defined(VMS) || defined(MSDOS)) && !defined(HAVE_STRING_H)
+#define HAVE_STRING_H 1
+#endif
+
+#if defined(STDC_HEADERS) || defined(HAVE_STRING_H)
+#include <string.h>
+/* An ANSI string.h and pre-ANSI memory.h might conflict.  */
+#if !defined(STDC_HEADERS) && defined(HAVE_MEMORY_H)
+#include <memory.h>
+#endif /* not STDC_HEADERS and HAVE_MEMORY_H */
+#ifndef bcopy
+#define bcopy(src, dst, num) memcpy((dst), (src), (num))
+#endif
+#else /* not STDC_HEADERS and not HAVE_STRING_H */
+#include <strings.h>
+/* memory.h and strings.h conflict on some systems.  */
+#endif /* not STDC_HEADERS and not HAVE_STRING_H */