diff --git a/configure.ac b/configure.ac
index e3e71044d..81c84a8af 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1231,6 +1231,7 @@ AC_SUBST(QR_LIBS)
 AC_CONFIG_FILES([Makefile src/Makefile doc/man/Makefile share/setup.nsi share/qt/Info.plist test/config.ini])
 AC_CONFIG_FILES([contrib/devtools/split-debug.sh],[chmod +x contrib/devtools/split-debug.sh])
 AC_CONFIG_FILES([doc/Doxyfile])
+AC_CONFIG_LINKS([contrib/filter-lcov.py:contrib/filter-lcov.py])
 AC_CONFIG_LINKS([test/functional/test_runner.py:test/functional/test_runner.py])
 AC_CONFIG_LINKS([test/util/bitcoin-util-test.py:test/util/bitcoin-util-test.py])
 
diff --git a/contrib/devtools/check-rpc-mappings.py b/contrib/devtools/check-rpc-mappings.py
index d2698de04..7e96852c5 100755
--- a/contrib/devtools/check-rpc-mappings.py
+++ b/contrib/devtools/check-rpc-mappings.py
@@ -63,7 +63,7 @@ def process_commands(fname):
                     else:
                         args = []
                     cmds.append(RPCCommand(name, args))
-    assert not in_rpcs, "Something went wrong with parsing the C++ file: update the regexps"
+    assert not in_rpcs and cmds, "Something went wrong with parsing the C++ file: update the regexps"
     return cmds
 
 def process_mapping(fname):
@@ -86,7 +86,7 @@ def process_mapping(fname):
                     idx = int(m.group(2))
                     argname = parse_string(m.group(3))
                     cmds.append((name, idx, argname))
-    assert not in_rpcs
+    assert not in_rpcs and cmds
     return cmds
 
 def main():