diff --git a/src/libsystemd/sd-bus/bus-match.c b/src/libsystemd/sd-bus/bus-match.c
index 3725d279d5..db8da6ee12 100644
--- a/src/libsystemd/sd-bus/bus-match.c
+++ b/src/libsystemd/sd-bus/bus-match.c
@@ -707,8 +707,8 @@ void bus_match_parse_free(struct bus_match_component *components, unsigned n_com
 
 int bus_match_parse(
                 const char *match,
-                struct bus_match_component **_components,
-                unsigned *_n_components) {
+                struct bus_match_component **ret_components,
+                unsigned *ret_n_components) {
 
         const char *p = match;
         struct bus_match_component *components = NULL;
@@ -718,8 +718,8 @@ int bus_match_parse(
         int r;
 
         assert(match);
-        assert(_components);
-        assert(_n_components);
+        assert(ret_components);
+        assert(ret_n_components);
 
         while (*p != 0) {
                 const char *eq, *q;
@@ -835,8 +835,8 @@ int bus_match_parse(
                         goto fail;
                 }
 
-        *_components = components;
-        *_n_components = n_components;
+        *ret_components = components;
+        *ret_n_components = n_components;
 
         return 0;
 
diff --git a/src/libsystemd/sd-bus/bus-match.h b/src/libsystemd/sd-bus/bus-match.h
index 577100081d..d079f6aec7 100644
--- a/src/libsystemd/sd-bus/bus-match.h
+++ b/src/libsystemd/sd-bus/bus-match.h
@@ -73,7 +73,7 @@ void bus_match_dump(struct bus_match_node *node, unsigned level);
 const char* bus_match_node_type_to_string(enum bus_match_node_type t, char buf[], size_t l);
 enum bus_match_node_type bus_match_node_type_from_string(const char *k, size_t n);
 
-int bus_match_parse(const char *match, struct bus_match_component **_components, unsigned *_n_components);
+int bus_match_parse(const char *match, struct bus_match_component **ret_components, unsigned *ret_n_components);
 void bus_match_parse_free(struct bus_match_component *components, unsigned n_components);
 char *bus_match_to_string(struct bus_match_component *components, unsigned n_components);