diff --git a/src/obidmscolumn.h b/src/obidmscolumn.h
index 400d88c..43530ac 100755
--- a/src/obidmscolumn.h
+++ b/src/obidmscolumn.h
@@ -36,7 +36,7 @@
 										   	   	 */
 #define COLUMN_GROWTH_FACTOR (2)	 	  		/**< The growth factor when a column is enlarged.
                                 	   	   	   	 */
-#define MAXIMUM_LINE_COUNT (1000000000)   		/**< The maximum line count for the data of a column (1E9). //TODO
+#define MAXIMUM_LINE_COUNT (1000000000000)      /**< The maximum line count for the data of a column (1E12). //TODO
                                 	       	   	 */
 #define COMMENTS_MAX_LENGTH (4096)        		/**< The maximum length for comments.
  	 	 	 	 	 	 	 	 	       	   	 */