3 files changed, 12 insertions, 0 deletions

diff --git a/lib-src/cvtmail.c b/lib-src/cvtmail.c
index 20ef3412439..83242a988a9 100644
--- a/lib-src/cvtmail.c
+++ b/lib-src/cvtmail.c
@@ -36,6 +36,10 @@ Boston, MA 02111-1307, USA.  */
 
 #include <stdio.h>
 
+#ifdef __GNU_LIBRARY__
+# include <string.h>
+#endif
+
 char *malloc ();
 char *realloc ();
 char *getenv ();
diff --git a/lib-src/sorted-doc.c b/lib-src/sorted-doc.c
index 0ba419d4907..cb521866ab5 100644
--- a/lib-src/sorted-doc.c
+++ b/lib-src/sorted-doc.c
@@ -8,6 +8,10 @@
 #include <stdio.h>
 #include <ctype.h>
 
+#ifdef __GNU_LIBRARY__
+# include <string.h>
+#endif
+
 extern char *malloc ();
 char *xmalloc ();
 
diff --git a/lib-src/yow.c b/lib-src/yow.c
index b67d2f1eeee..a37563a6f33 100644
--- a/lib-src/yow.c
+++ b/lib-src/yow.c
@@ -14,6 +14,10 @@
 #include <ctype.h>
 #include <../src/paths.h>      /* For PATH_DATA.  */
 
+#ifdef __GNU_LIBRARY__
+# include <string.h>
+#endif
+
 #define BUFSIZE  80
 #define SEP      '\0'