diff --git a/tools/vtk2h5grid/Makefile.am b/tools/vtk2h5grid/Makefile.am
index e284dc2..dab39d2 100644
--- a/tools/vtk2h5grid/Makefile.am
+++ b/tools/vtk2h5grid/Makefile.am
@@ -1,6 +1,6 @@
 AM_CPPFLAGS = -I${abs_top_srcdir}/src/include -Wno-deprecated
 FFLAGS += -cpp $(AM_CPPFLAGS)
-LDFLAGS += -L${abs_top_builddir}/src/h5core
+AM_LDFLAGS += -L${abs_top_builddir}/src/h5core
 
 LDADD =