diff --git a/src/filerd.cpp b/src/filerd.cpp
index f76fbbc..768006a 100644
--- a/src/filerd.cpp
+++ b/src/filerd.cpp
@@ -82,10 +82,11 @@ namespace rexy{
 	}
 	rexy::string filerd::readln(size_t max)noexcept{
 		rexy::string ret;
-		char c;
+		int c;
 		size_t count = 0;
 		for(c = fgetc(m_fp);c != EOF && c != '\n';c = fgetc(m_fp)){
-			ret.append(&c, 1);
+			char ch = c;
+			ret.append(&ch, 1);
 			if(++count == max)
 				break;
 		}