diff --git a/libknet/tests/Makefile.am b/libknet/tests/Makefile.am
index 37f5935f5..86312072e 100644
--- a/libknet/tests/Makefile.am
+++ b/libknet/tests/Makefile.am
@@ -16,7 +16,7 @@ EXTRA_DIST		= \
 			  api-check.mk
 
 AM_CPPFLAGS		= -I$(top_srcdir)/libknet
-AM_CFLAGS		+= $(PTHREAD_CFLAGS)
+AM_CFLAGS		+= $(PTHREAD_CFLAGS) $(libqb_CFLAGS)
 LIBS			= $(top_builddir)/libknet/libknet.la \
 			  $(PTHREAD_LIBS) $(dl_LIBS)