4 files changed, 11 insertions, 0 deletions
diff --git a/archival/ar.c b/archival/ar.c
index 596574e6a..550b2a1c4 100644
--- a/archival/ar.c
+++ b/archival/ar.c
@@ -23,6 +23,10 @@
  *
  */
 #include <fcntl.h>
+#include <string.h>
+#include <stdlib.h>
+#include <getopt.h>
+#include <unistd.h>
 #include "busybox.h"
 
 typedef struct ar_headers_s {
diff --git a/archival/dpkg_deb.c b/archival/dpkg_deb.c
index 35904950f..3a789379b 100644
--- a/archival/dpkg_deb.c
+++ b/archival/dpkg_deb.c
@@ -17,6 +17,9 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <fcntl.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
 #include "busybox.h"
 
 typedef struct ar_headers_s {
diff --git a/archival/gzip.c b/archival/gzip.c
index 09260929e..5a74868c1 100644
--- a/archival/gzip.c
+++ b/archival/gzip.c
@@ -45,6 +45,7 @@
  */
 #include <stdio.h>
 #include <string.h>
+#include <unistd.h>
 #define memzero(s, n)     memset ((void *)(s), 0, (n))
 
 #ifndef RETSIGTYPE
diff --git a/archival/tar.c b/archival/tar.c
index 51a857d71..2c7169bcc 100644
--- a/archival/tar.c
+++ b/archival/tar.c
@@ -52,6 +52,9 @@
 #include <sys/sysmacros.h>
 #include <getopt.h>
 #include <fnmatch.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
 
 #ifdef BB_FEATURE_TAR_GZIP
 extern int unzip(int in, int out);