diff --git a/build/aclocal/cppunit.m4 b/build/aclocal/cppunit.m4
index 0991d51ec0..96b3db78ca 100644
--- a/build/aclocal/cppunit.m4
+++ b/build/aclocal/cppunit.m4
@@ -1,7 +1,7 @@
 dnl
 dnl AM_PATH_CPPUNIT(MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
 dnl
-AC_DEFUN([AM_PATH_CPPUNIT],
+AC_DEFUN(AM_PATH_CPPUNIT,
 [
 
 AC_ARG_WITH(cppunit-prefix,[  --with-cppunit-prefix=PFX   Prefix where CppUnit is installed (optional)],