diff --git a/include/coap/coap.h.in b/include/coap/coap.h.in
index 76ebc5eb..c553301d 100644
--- a/include/coap/coap.h.in
+++ b/include/coap/coap.h.in
@@ -14,19 +14,19 @@
 #include "libcoap.h"
 
 /* Define the address where bug reports for libcoap should be sent. */
-#define LIBCOAP_PACKAGE_BUGREPORT @PACKAGE_BUGREPORT@
+#define LIBCOAP_PACKAGE_BUGREPORT "@PACKAGE_BUGREPORT@"
 
 /* Define the full name of libcoap. */
-#define LIBCOAP_PACKAGE_NAME @PACKAGE_NAME@
+#define LIBCOAP_PACKAGE_NAME "@PACKAGE_NAME@"
 
 /* Define the full name and version of libcoap. */
-#define LIBCOAP_PACKAGE_STRING @PACKAGE_STRING@
+#define LIBCOAP_PACKAGE_STRING "@PACKAGE_STRING@"
 
 /* Define the home page for libcoap. */
-#define LIBCOAP_PACKAGE_URL @PACKAGE_URL@
+#define LIBCOAP_PACKAGE_URL "@PACKAGE_URL@"
 
 /* Define the version of libcoap this file belongs to. */
-#define LIBCOAP_PACKAGE_VERSION @PACKAGE_VERSION@
+#define LIBCOAP_PACKAGE_VERSION "@PACKAGE_VERSION@"
 
 #ifdef __cplusplus
 extern "C" {