diff --git a/configure.ac b/configure.ac
index a953b1421c..36e00e52bc 100644
--- a/configure.ac
+++ b/configure.ac
@@ -393,7 +393,7 @@ int mkstemp(char*);
  * implements this with the help of libc, or whether it has own code
  * does not matter for us, because we don't use libc directly (Georg)
 */
-#if defined(HAVE_WCHAR_T) && SIZEOF_WCHAR_T == 4 && ! defined(__FREEBSD__)
+#if defined(HAVE_WCHAR_T) && SIZEOF_WCHAR_T == 4 && !defined(__FreeBSD__) && !defined(__FreeBSD_kernel__)
 #  define USE_WCHAR_T
 #endif
 
diff --git a/development/cmake/config.h.cmake b/development/cmake/config.h.cmake
index 3bd17bc019..91f026edee 100644
--- a/development/cmake/config.h.cmake
+++ b/development/cmake/config.h.cmake
@@ -171,7 +171,7 @@
  * implements this with the help of libc, or whether it has own code
  * does not matter for us, because we don't use libc directly (Georg)
 */
-#if defined(HAVE_WCHAR_T) && SIZEOF_WCHAR_T == 4 && ! defined(__FREEBSD__)
+#if defined(HAVE_WCHAR_T) && SIZEOF_WCHAR_T == 4 && !defined(__FreeBSD__) && !defined(__FreeBSD_kernel__)
 #  define USE_WCHAR_T
 #endif
 
diff --git a/development/scons/SConstruct b/development/scons/SConstruct
index 687366f260..c4cab67f10 100644
--- a/development/scons/SConstruct
+++ b/development/scons/SConstruct
@@ -829,7 +829,7 @@ utils.createConfigFile(conf,
  * implements this with the help of libc, or whether it has own code
  * does not matter for us, because we don't use libc directly (Georg)
 */
-#if defined(HAVE_WCHAR_T) && SIZEOF_WCHAR_T == 4 && ! defined(__FREEBSD__)
+#if defined(HAVE_WCHAR_T) && SIZEOF_WCHAR_T == 4 && !defined(__FreeBSD__) && !defined(__FreeBSD_kernel__)
 #  define USE_WCHAR_T
 #endif