diff --git a/contrib/global/gtags/gtags.c b/contrib/global/gtags/gtags.c
index 288c16c1daf..bfd9aba0995 100644
--- a/contrib/global/gtags/gtags.c
+++ b/contrib/global/gtags/gtags.c
@@ -37,6 +37,7 @@
 #include <ctype.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include <time.h>
 #include <unistd.h>
 
diff --git a/contrib/global/lib/find.c b/contrib/global/lib/find.c
index 6203e008a6f..10a9bf1cde7 100644
--- a/contrib/global/lib/find.c
+++ b/contrib/global/lib/find.c
@@ -32,6 +32,7 @@
  *
  */
 #include <stdio.h>
+#include <string.h>
 #include <sys/types.h>
 #include <regex.h>
 #include <sys/param.h>
diff --git a/contrib/global/lib/getdbpath.c b/contrib/global/lib/getdbpath.c
index 1e4e7cfaeff..73f1a4f4805 100644
--- a/contrib/global/lib/getdbpath.c
+++ b/contrib/global/lib/getdbpath.c
@@ -37,6 +37,7 @@
 
 #include <unistd.h>
 #include <stdlib.h>
+#include <string.h>
 
 #include "die.h"
 #include "getdbpath.h"
diff --git a/contrib/global/lib/makepath.c b/contrib/global/lib/makepath.c
index ba00ecfc6c2..7efba18dd29 100644
--- a/contrib/global/lib/makepath.c
+++ b/contrib/global/lib/makepath.c
@@ -31,6 +31,7 @@
  *	makepath.c				20-Oct-97
  *
  */
+#include <string.h>
 #include <sys/param.h>
 #include "makepath.h"
 /*
diff --git a/contrib/global/lib/mgets.c b/contrib/global/lib/mgets.c
index 2bc6099517c..b30cae64393 100644
--- a/contrib/global/lib/mgets.c
+++ b/contrib/global/lib/mgets.c
@@ -33,6 +33,7 @@
  */
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 
 #include "mgets.h"
 #include "die.h"