diff --git a/configure.ac b/configure.ac
index 3ca5f550..7ec25df3 100755
--- a/configure.ac
+++ b/configure.ac
@@ -523,6 +523,18 @@ AH_BOTTOM([
 #ifdef HAVE_BSD_STRING_H
 #include <bsd/string.h>
 #endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef HAVE_STRLCPY
+size_t strlcpy(char *dst, const char *src, size_t siz);
+#endif
+
+#ifdef __cplusplus
+}
+#endif
 ])
 
 dnl ---------------------------------------------------------------------------
diff --git a/src/config.h.in b/src/config.h.in
index bc517817..e3a7fe64 100644
--- a/src/config.h.in
+++ b/src/config.h.in
@@ -238,3 +238,15 @@
 #include <bsd/string.h>
 #endif
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef HAVE_STRLCPY
+size_t strlcpy(char *dst, const char *src, size_t siz);
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+