1 files changed, 7 insertions, 3 deletions
diff --git a/src/user/lib/fwik/include/IO/IOStream.h b/src/user/lib/fwik/include/IO/IOStream.h
index e381cf5..2e33268 100644
--- a/src/user/lib/fwik/include/IO/IOStream.h
+++ b/src/user/lib/fwik/include/IO/IOStream.h
@@ -12,14 +12,18 @@ class IOStream {
 	IOStream() : term(0) {}
 	IOStream(Term *t) : term(t) {}
 
-	void print(char* str);
-	void printf(char* fmt, ...);
+	void print(const char* str);
+	void printf(const char* fmt, ...);
 	String readln();
 
-	IOStream &operator<<(char* s) {
+	IOStream &operator<<(const char* s) {
 		print(s);
 		return *this;
 	}
+	IOStream &operator<<(const String& s) {
+		print(s.c_str());
+		return *this;
+	}
 	IOStream &operator<<(int i) {
 		printf("%d", i);
 		return *this;