diff --git a/eval.c b/eval.c
index 94067fcda2..800d001cce 100644
--- a/eval.c
+++ b/eval.c
@@ -74,16 +74,6 @@ char *strrchr _((const char*,const char));
 #endif
 
 #include <sys/types.h>
-#ifdef HAVE_SYS_TIME_H
-# include <sys/time.h>
-#else
-#ifndef NT
-struct timeval {
-        long    tv_sec;         /* seconds */
-        long    tv_usec;        /* and microseconds */
-};
-#endif /* NT */
-#endif
 #include <signal.h>
 #include <errno.h>
 
diff --git a/io.c b/io.c
index 083c8e952c..8671edeac2 100644
--- a/io.c
+++ b/io.c
@@ -60,17 +60,6 @@
 # define ftello  ftell
 #endif
 
-#ifdef HAVE_SYS_TIME_H
-# include <sys/time.h>
-#else
-#ifndef NT
-struct timeval {
-        long    tv_sec;         /* seconds */
-        long    tv_usec;        /* and microseconds */
-};
-#endif
-#endif
-
 #include <sys/stat.h>
 
 /* EMX has sys/param.h, but.. */
diff --git a/missing.h b/missing.h
index f9c9c6d0d4..44e5f86cb9 100644
--- a/missing.h
+++ b/missing.h
@@ -1,6 +1,7 @@
 /************************************************
 
-  missing.h - prototype for *.c in ./missing
+  missing.h - prototype for *.c in ./missing, and
+  	      for missing timeval struct
 
   $Author$
   $Date$
@@ -11,6 +12,16 @@
 #ifndef MISSING_H
 #define MISSING_H
 
+#if defined(HAVE_SYS_TIME_H)
+#  include <sys/time.h>
+#elif !defined(NT)
+#  define time_t long
+struct timeval {
+    time_t tv_sec;	/* seconds */
+    time_t tv_usec;	/* microseconds */
+};
+#endif
+
 #ifndef HAVE_ACOSH
 extern double acosh _((double));
 extern double asinh _((double));
diff --git a/process.c b/process.c
index 9d98bc587c..2a2f9afee2 100644
--- a/process.c
+++ b/process.c
@@ -22,16 +22,6 @@
 #endif
 
 #include <time.h>
-#ifndef NT
-#ifdef HAVE_SYS_TIME_H
-# include <sys/time.h>
-#else
-struct timeval {
-        long    tv_sec;         /* seconds */
-        long    tv_usec;        /* and microseconds */
-};
-#endif
-#endif /* NT */
 #include <ctype.h>
 
 struct timeval rb_time_interval _((VALUE));
diff --git a/random.c b/random.c
index 547c13a0e1..4f1f5fabe8 100644
--- a/random.c
+++ b/random.c
@@ -144,16 +144,6 @@ genrand_real()
 #include <unistd.h>
 #endif
 #include <time.h>
-#ifndef NT
-#ifdef HAVE_SYS_TIME_H
-# include <sys/time.h>
-#else
-struct timeval {
-        long    tv_sec;         /* seconds */
-        long    tv_usec;        /* and microseconds */
-};
-#endif
-#endif /* NT */
 
 static int first = 1;
 
diff --git a/time.c b/time.c
index 01d370ed79..30b13fb674 100644
--- a/time.c
+++ b/time.c
@@ -12,23 +12,12 @@
 
 #include "ruby.h"
 #include <sys/types.h>
-
 #include <time.h>
-#ifndef NT
-#ifdef HAVE_SYS_TIME_H
-# include <sys/time.h>
-#else
-#define time_t long
-struct timeval {
-        time_t tv_sec;		/* seconds */
-        time_t tv_usec;		/* and microseconds */
-};
-#endif
-#endif /* NT */
 
 #ifdef HAVE_UNISTD_H
 #include <unistd.h>
 #endif
+
 #include <math.h>
 
 VALUE rb_cTime;