diff --git a/config.h.cmake b/config.h.cmake
index 7eb5993f..90ae2eba 100644
--- a/config.h.cmake
+++ b/config.h.cmake
@@ -1,5 +1,8 @@
 /* config.h. Generated by cmake from config.h.cmake */
 
+#ifndef TAGLIB_CONFIG_H
+#define TAGLIB_CONFIG_H
+
 /* Defined if your compiler supports some byte swap functions */
 #cmakedefine   HAVE_BOOST_BYTESWAP 1
 #cmakedefine   HAVE_GCC_BYTESWAP 1
@@ -31,3 +34,5 @@
 #cmakedefine   TRACE_IN_RELEASE 1
 
 #cmakedefine TESTS_DIR "@TESTS_DIR@"
+
+#endif
diff --git a/taglib/taglib_config.h.cmake b/taglib/taglib_config.h.cmake
index 5f0ee6cf..915f130a 100644
--- a/taglib/taglib_config.h.cmake
+++ b/taglib/taglib_config.h.cmake
@@ -1,6 +1,11 @@
 /* taglib_config.h. Generated by cmake from taglib_config.h.cmake */
 
+#ifndef TAGLIB_TAGLIB_CONFIG_H
+#define TAGLIB_TAGLIB_CONFIG_H
+
 /* These values are no longer used. This file is present only for compatibility reasons. */
 
 #define   TAGLIB_WITH_ASF 1
 #define   TAGLIB_WITH_MP4 1
+
+#endif