diff --git a/libx52/Makefile.am b/libx52/Makefile.am
index 22a3927..0e6cde0 100644
--- a/libx52/Makefile.am
+++ b/libx52/Makefile.am
@@ -49,8 +49,12 @@ libx52test_LDFLAGS = @CMOCKA_LIBS@ @LIBUSB_LIBS@
 libx52test_LDADD = libx52.la
 
 CLEANFILES += libx52/test_libx52.c
-$(builddir)/libx52/test_libx52.c: $(srcdir)/libx52/x52_test_gen.py $(srcdir)/libx52/x52_tests.json
-	$(AM_V_GEN) $(PYTHON) $(srcdir)/libx52/x52_test_gen.py $(srcdir)/libx52/x52_tests.json > $@
+test_libx52_c_DEPENDS = \
+	$(srcdir)/libx52/x52_test_gen.py \
+	$(srcdir)/libx52/x52_tests.json
+
+libx52/test_libx52.c: $(test_libx52_c_DEPENDS)
+	$(AM_V_GEN) $(PYTHON) $(test_libx52_c_DEPENDS) > $@
 endif
 
 # Extra files that need to be in the distribution
diff --git a/libx52util/Makefile.am b/libx52util/Makefile.am
index d3f2694..efb4d8e 100644
--- a/libx52util/Makefile.am
+++ b/libx52util/Makefile.am
@@ -25,7 +25,7 @@ util_char_map_c_DEPENDS = \
 	$(srcdir)/libx52util/x52_char_map_gen.py \
 	$(srcdir)/libx52util/x52_char_map.cfg
 
-$(builddir)/libx52util/util_char_map.c: $(util_char_map_c_DEPENDS)
+libx52util/util_char_map.c: $(util_char_map_c_DEPENDS)
 	$(AM_V_GEN) $(PYTHON) $(util_char_map_c_DEPENDS) $@
 
 # Extra files that need to be in the distribution