diff --git a/include/ipfs/path/path.h b/include/ipfs/path/path.h
index ba3b81e..0116ed2 100644
--- a/include/ipfs/path/path.h
+++ b/include/ipfs/path/path.h
@@ -25,7 +25,7 @@
    int SegmentsLength (char **s);
    void FreeSegments (char ***s);
    int IsJustAKey (char *p);
-   int PopLastSegment (char *p, char **str);
+   int PopLastSegment (char **str, char *p);
    char *PathFromSegments(char *prefix, char **seg);
    int ParseCidToPath (char *dst, char *txt);
    int ParsePath (char *dst, char *txt);
diff --git a/path/path.c b/path/path.c
index 21d6223..d3f9fe7 100644
--- a/path/path.c
+++ b/path/path.c
@@ -82,7 +82,7 @@ int IsJustAKey (char *p)
 // PopLastSegment returns a new Path without its final segment, and the final
 // segment, separately. If there is no more to pop (the path is just a key),
 // the original path is returned.
-int PopLastSegment (char *p, char **str)
+int PopLastSegment (char **str, char *p)
 {
    if (IsJustAKey(p)) return 0;
    *str = strrchr(p, '/');