diff --git a/src/fundamental/string-util-fundamental.c b/src/fundamental/string-util-fundamental.c
index a5bafc63f4..a18b2bc4c9 100644
--- a/src/fundamental/string-util-fundamental.c
+++ b/src/fundamental/string-util-fundamental.c
@@ -33,14 +33,14 @@ sd_char *startswith_no_case(const sd_char *s, const sd_char *prefix) {
         return (sd_char*) s + l;
 }
 
-sd_char* endswith(const sd_char *s, const sd_char *postfix) {
+sd_char* endswith(const sd_char *s, const sd_char *suffix) {
         size_t sl, pl;
 
         assert(s);
-        assert(postfix);
+        assert(suffix);
 
         sl = strlen(s);
-        pl = strlen(postfix);
+        pl = strlen(suffix);
 
         if (pl == 0)
                 return (sd_char*) s + sl;
@@ -48,20 +48,20 @@ sd_char* endswith(const sd_char *s, const sd_char *postfix) {
         if (sl < pl)
                 return NULL;
 
-        if (strcmp(s + sl - pl, postfix) != 0)
+        if (!streq(s + sl - pl, suffix))
                 return NULL;
 
         return (sd_char*) s + sl - pl;
 }
 
-sd_char* endswith_no_case(const sd_char *s, const sd_char *postfix) {
+sd_char* endswith_no_case(const sd_char *s, const sd_char *suffix) {
         size_t sl, pl;
 
         assert(s);
-        assert(postfix);
+        assert(suffix);
 
         sl = strlen(s);
-        pl = strlen(postfix);
+        pl = strlen(suffix);
 
         if (pl == 0)
                 return (sd_char*) s + sl;
@@ -69,7 +69,7 @@ sd_char* endswith_no_case(const sd_char *s, const sd_char *postfix) {
         if (sl < pl)
                 return NULL;
 
-        if (strcasecmp(s + sl - pl, postfix) != 0)
+        if (!strcaseeq(s + sl - pl, suffix))
                 return NULL;
 
         return (sd_char*) s + sl - pl;
diff --git a/src/fundamental/string-util-fundamental.h b/src/fundamental/string-util-fundamental.h
index b537b2e31c..419f1cc3da 100644
--- a/src/fundamental/string-util-fundamental.h
+++ b/src/fundamental/string-util-fundamental.h
@@ -59,8 +59,8 @@ static inline size_t strlen_ptr(const sd_char *s) {
 
 sd_char *startswith(const sd_char *s, const sd_char *prefix) _pure_;
 sd_char *startswith_no_case(const sd_char *s, const sd_char *prefix) _pure_;
-sd_char *endswith(const sd_char *s, const sd_char *postfix) _pure_;
-sd_char *endswith_no_case(const sd_char *s, const sd_char *postfix) _pure_;
+sd_char *endswith(const sd_char *s, const sd_char *suffix) _pure_;
+sd_char *endswith_no_case(const sd_char *s, const sd_char *suffix) _pure_;
 
 static inline bool isempty(const sd_char *a) {
         return !a || a[0] == '\0';