diff --git a/src/include/lib3270.h b/src/include/lib3270.h
index 41b7a2c..69497ca 100644
--- a/src/include/lib3270.h
+++ b/src/include/lib3270.h
@@ -421,7 +421,7 @@
 	 */
 	LIB3270_EXPORT int lib3270_get_height(H3270 *h);
 
-	LIB3270_EXPORT unsigned int lib3270_get_length(H3270 *h);
+	LIB3270_EXPORT int lib3270_get_length(H3270 *h);
 
 	/**
 	 * @brief Creates an empty TN3270 session.
diff --git a/src/lib3270/properties.c b/src/lib3270/properties.c
index 8b0b0b1..68afdfe 100644
--- a/src/lib3270/properties.c
+++ b/src/lib3270/properties.c
@@ -142,6 +142,22 @@
 			NULL							//  Set value.
 		},
 
+		/*
+		{
+			"",						//  Property name.
+			N_( "" ),				//  Property description.
+			NULL,					//  Get value.
+			NULL					//  Set value.
+		},
+		*/
+
+		{
+			NULL,
+			NULL,
+			NULL,
+			NULL
+		}
+
 	};
 
 	return properties;
diff --git a/src/lib3270/screen.c b/src/lib3270/screen.c
index bfa4a4a..779752c 100644
--- a/src/lib3270/screen.c
+++ b/src/lib3270/screen.c
@@ -217,7 +217,7 @@ static unsigned short calc_attrs(H3270 *session, int baddr, int fa_addr, int fa)
 	return a;
 }
 
-LIB3270_EXPORT unsigned int lib3270_get_length(H3270 *h)
+LIB3270_EXPORT int lib3270_get_length(H3270 *h)
 {
 	CHECK_SESSION_HANDLE(h);
 	return h->rows * h->cols;
--
libgit2 0.21.2