diff --git a/configure.in b/configure.in
index 46a7a1b4..9dc52df5 100644
--- a/configure.in
+++ b/configure.in
@@ -26,12 +26,13 @@ AC_ARG_ENABLE(integration-tests,
                              [enables tests outside of the library (can be used together with normal builds of the library)]),
               enable_integration_tests="$enableval", enable_integration_tests="no")
 
+AC_CHECK_HEADERS(signal.h)
+
 # cppunit needed?
 if test $enable_unit_tests == "yes" || test $enable_integration_tests == yes; then
         CPPUNIT_CXXFLAGS=`cppunit-config --cflags` || AC_MSG_ERROR("cppunit-config --cflags failed - is it installed?")
         CPPUNIT_LDFLAGS=`cppunit-config --libs` || AC_MSG_ERROR("cppunit-config --libs failed - is it installed?")
         CPPUNIT_TESTS=client-test
-        AC_CHECK_HEADERS(signal.h)
 fi
 AC_SUBST(CPPUNIT_CXXFLAGS)
 AC_SUBST(CPPUNIT_LDFLAGS)