diff --git a/0BUILD b/0BUILD
index 86ea95b..b3d7798 100644
--- a/0BUILD
+++ b/0BUILD
@@ -74,8 +74,8 @@
       <choices>TRUE FALSE</choices>
     </option>
     <ifVarMatches name="option_debug" value="TRUE" >
-      <setVar name="CFLAGS">-ggdb -Wall -O0</setVar>
-      <setVar name="CXXFLAGS">-ggdb -Wall -O0</setVar>
+      <setVar name="CFLAGS">-ggdb -Wall -Og</setVar>
+      <setVar name="CXXFLAGS">-ggdb -Wall -Og</setVar>
     </ifVarMatches>