diff --git a/Feature-Matrix.md b/Feature-Matrix.md
index a1359d5..d2d6080 100644
--- a/Feature-Matrix.md
+++ b/Feature-Matrix.md
@@ -249,7 +249,6 @@
   <td>GPU backend</td>
 
   <td>after 1.0</td>
-
 </tr>
 
 
@@ -258,7 +257,7 @@
   <td>symbol files</td>
 
   <td>after 1.0</td>
-
+  <td>symbol files provide true incremental compilation beyond the caching of generated C code</td>
 </tr>
 
 
@@ -267,7 +266,7 @@
   <td>deterministic code generation</td>
 
   <td>0.9.8</td>
-
+  <td>deterministic code generation makes C code caching much more effective</td>
 </tr>
 
 </table>