diff --git a/src/interdiff.c b/src/interdiff.c
index 9c37cf4..93b2000 100644
--- a/src/interdiff.c
+++ b/src/interdiff.c
@@ -837,7 +837,7 @@ apply_patch (FILE *patch, const char *file, int reverted)
 	    basename = file;
 
 	w = xpipe(PATCH, &child, "w", PATCH,
-		  reverted ? "-Rsp0" : "-sp0", file, NULL);
+		  reverted ? "-Rlsp0" : "-lsp0", file, NULL);
 
 	fprintf (w, "--- %s\n+++ %s\n", basename, basename);
 	line = NULL;