diff --git a/gnu/usr.bin/ld/common/shlib.c b/gnu/usr.bin/ld/common/shlib.c
index 60558f2cb051..0de184a4a477 100644
--- a/gnu/usr.bin/ld/common/shlib.c
+++ b/gnu/usr.bin/ld/common/shlib.c
@@ -1,5 +1,5 @@
 /*
- * $Id: shlib.c,v 1.5 1993/11/21 21:01:08 mycroft Exp $
+ * $Id: shlib.c,v 1.6 1993/12/07 03:04:28 mycroft Exp $
  */
 
 #include <sys/param.h>
@@ -11,6 +11,7 @@
 #include <sys/time.h>
 #include <fcntl.h>
 #include <string.h>
+#include <ctype.h>
 #include <dirent.h>
 #include <a.out.h>
 
diff --git a/gnu/usr.bin/ld/shlib.c b/gnu/usr.bin/ld/shlib.c
index 60558f2cb051..0de184a4a477 100644
--- a/gnu/usr.bin/ld/shlib.c
+++ b/gnu/usr.bin/ld/shlib.c
@@ -1,5 +1,5 @@
 /*
- * $Id: shlib.c,v 1.5 1993/11/21 21:01:08 mycroft Exp $
+ * $Id: shlib.c,v 1.6 1993/12/07 03:04:28 mycroft Exp $
  */
 
 #include <sys/param.h>
@@ -11,6 +11,7 @@
 #include <sys/time.h>
 #include <fcntl.h>
 #include <string.h>
+#include <ctype.h>
 #include <dirent.h>
 #include <a.out.h>
 
diff --git a/libexec/ld.aout_so/shlib.c b/libexec/ld.aout_so/shlib.c
index 60558f2cb051..0de184a4a477 100644
--- a/libexec/ld.aout_so/shlib.c
+++ b/libexec/ld.aout_so/shlib.c
@@ -1,5 +1,5 @@
 /*
- * $Id: shlib.c,v 1.5 1993/11/21 21:01:08 mycroft Exp $
+ * $Id: shlib.c,v 1.6 1993/12/07 03:04:28 mycroft Exp $
  */
 
 #include <sys/param.h>
@@ -11,6 +11,7 @@
 #include <sys/time.h>
 #include <fcntl.h>
 #include <string.h>
+#include <ctype.h>
 #include <dirent.h>
 #include <a.out.h>