diff --git a/Makefile.am b/Makefile.am
index 817a579..626ad60 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -46,6 +46,7 @@ pkgconfig_DATA = pkgconfig/qmckl.pc
 
 qmckl_h = include/qmckl.h
 qmckl_f = include/qmckl_f.F90
+qmckl_fo = include/qmckl_f.o
 include_HEADERS = $(qmckl_h) $(qmckl_f)
 
 header_tests  = tests/chbrclf.h tests/n2.h
@@ -61,7 +62,7 @@ lib_LTLIBRARIES = src/libqmckl.la
 src_libqmckl_la_SOURCES = $(qmckl_h) $(qmckl_f) $(C_FILES) $(F_FILES) $(H_PRIVATE_FUNC_FILES) $(H_PRIVATE_TYPE_FILES)
 src_libqmckl_la_LDFLAGS = $(LDFLAGS)
 
-CLEANFILES+=$(test_qmckl_fo) $(qmckl_fo) $(test_qmckl_o) $(FH_TYPE_FILES) $(FH_FUNC_FILES)
+CLEANFILES+=$(qmckl_fo) $(test_qmckl_o) $(FH_TYPE_FILES) $(FH_FUNC_FILES)
 
 
 include generated.mk
diff --git a/tools/build_makefile.py b/tools/build_makefile.py
index d44a0bf..4fcb6b2 100755
--- a/tools/build_makefile.py
+++ b/tools/build_makefile.py
@@ -178,14 +178,14 @@ def main():
             F_TEST_FILES += [f_test]
 
             if f_test in DEPS:
-                DEPS_TEST[f_test] += [tangled, "$(test_qmckl_fo)"]
+                DEPS_TEST[f_test] += [tangled]
             else:
-                DEPS_TEST[f_test]  = [tangled, "$(test_qmckl_fo)"]
+                DEPS_TEST[f_test]  = [tangled]
 
             if c_test_x in TESTS:
-                TESTS[c_test_x] += [f_test, "$(test_qmckl_fo)"]
+                TESTS[c_test_x] += [f_test]
             else:
-                TESTS[c_test_x]  = [f_test, "$(test_qmckl_fo)"]
+                TESTS[c_test_x]  = [f_test]
 
     output = ["",
               "## Source files",
@@ -240,8 +240,7 @@ def main():
     output+= ["",
               "## Test files",
               "",
-              "$(header_tests): $(TANGLED_FILES)",
-              "$(test_qmckl_fo): $(test_qmckl_f)"]
+              "$(header_tests): $(TANGLED_FILES)" ]
     output += ["",
                 "check_PROGRAMS = $(TESTS)" ]
     for f in sorted(TESTS.keys()):