diff --git a/include/yaml-cpp/ostream_wrapper.h b/include/yaml-cpp/ostream_wrapper.h
index f2446a5..b168c1c 100644
--- a/include/yaml-cpp/ostream_wrapper.h
+++ b/include/yaml-cpp/ostream_wrapper.h
@@ -49,9 +49,20 @@ namespace YAML
         bool m_comment;
 	};
 	
-	ostream_wrapper& operator << (ostream_wrapper& out, const char *str);
-	ostream_wrapper& operator << (ostream_wrapper& out, const std::string& str);
-	ostream_wrapper& operator << (ostream_wrapper& out, char ch);
+	inline ostream_wrapper& operator << (ostream_wrapper& stream, const char *str) {
+        stream.write(str, std::strlen(str));
+        return stream;
+    }
+    
+	inline ostream_wrapper& operator << (ostream_wrapper& stream, const std::string& str) {
+        stream.write(str);
+        return stream;
+    }
+    
+	inline ostream_wrapper& operator << (ostream_wrapper& stream, char ch) {
+        stream.write(&ch, 1);
+        return stream;
+    }
 }
 
 #endif // OSTREAM_WRAPPER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
diff --git a/src/ostream_wrapper.cpp b/src/ostream_wrapper.cpp
index e30ac59..15d9f0f 100644
--- a/src/ostream_wrapper.cpp
+++ b/src/ostream_wrapper.cpp
@@ -53,22 +53,4 @@ namespace YAML
             m_comment = false;
 		}
     }
-
-	ostream_wrapper& operator << (ostream_wrapper& out, const char *str)
-	{
-        out.write(str, std::strlen(str));
-		return out;
-	}
-	
-	ostream_wrapper& operator << (ostream_wrapper& out, const std::string& str)
-	{
-		out.write(str);
-		return out;
-	}
-	
-	ostream_wrapper& operator << (ostream_wrapper& out, char ch)
-	{
-		out.write(&ch, 1);
-		return out;
-	}
 }