diff --git a/configure.ac b/configure.ac
index fb8d28fb..a084e926 100644
--- a/configure.ac
+++ b/configure.ac
@@ -540,6 +540,9 @@ AC_CHECK_HEADER([sys/mman.h], [
 AC_CHECK_FUNC([mprotect],[AC_DEFINE(C_HAVE_MPROTECT,1)])
 ])
 
+dnl Check for realpath. Used on Linux
+AC_CHECK_FUNCS([realpath])
+
 dnl Setpriority
 AH_TEMPLATE(C_SET_PRIORITY,[Define to 1 if you have setpriority support])
 AC_MSG_CHECKING(for setpriority support)