diff --git a/Conf.c b/Conf.c
index 6e5d60c..93eb125 100644
--- a/Conf.c
+++ b/Conf.c
@@ -63,7 +63,7 @@ static size_t firstIndex(StrView *view, char symbol) {
 static int split(StrView *view, StrView *prefix, char delim) {
     size_t position;
 
-    if ((position = firstIndex(view, delim)) == -1)
+    if ((position = firstIndex(view, delim)) == (size_t)-1)
         return 0;
 
     prefix->data = view->data;
@@ -179,7 +179,7 @@ int CgeConfFromCb(CgeConfIO *io, CgeConfCb callback, void *user) {
     StrView view;
 
     while ((view.size = readLine(io, buffer, MAX_LINE))) {
-        if (view.size == -1)
+        if (view.size == (size_t)-1)
             return 0;
         view.data = buffer;
         parseLine(&view, callback, user);