diff --git a/coreutils/rm.c b/coreutils/rm.c
index bb6ab12..cc5f539 100644
--- a/coreutils/rm.c
+++ b/coreutils/rm.c
@@ -39,13 +39,14 @@ int rmtree(const char *path) {
 		if (!strcmp(ep->d_name, ".") || !strcmp(ep->d_name, ".."))
 			continue;
 
+		size_t len = strlen(path) + strlen(ep->d_name) + 2;
 		char *full_path = malloc(strlen(path) + strlen(ep->d_name) + 1);
 		if (full_path == NULL) {
 			fprintf(stderr, "rm: malloc() returned NULL\n");
 			return 1;
 		}
 
-		sprintf(full_path, "%s/%s", path, ep->d_name);
+		snprintf(full_path, len, "%s/%s", path, ep->d_name);
 
 		rmtree(full_path);
 		free(full_path);