diff --git a/ChangeLog b/ChangeLog
index 918e1ec74..4662c08a9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2003-08-10  Alexandre Duret-Lutz  <aduret@src.lip6.fr>
+
+	* src/ltlenv/environment.hh: Typo in comments.
+
 2003-08-08  Alexandre Duret-Lutz  <aduret@src.lip6.fr>
 
 	* src/ltlparse/ltlparse.yy: Handle and diagnose mismatched parentheses.
@@ -19,7 +23,7 @@
 	* src/ltltest/equals.test: Check this.
 
 	* src/ltlvisit/dotty.cc (draw_node_): s/shabe/shape/.
-	(visit): Draw rectangular node for atomic propositions and
+	(visit): Draw rectangular nodes for atomic propositions and
 	constant.  This is an attempt to mimic BuDDy's output.
 
 	* wrap/python/cgi/ltl2tgba.in: Handle show_formula_dot and
diff --git a/src/ltlenv/environment.hh b/src/ltlenv/environment.hh
index 5720e6275..4997e3fa4 100644
--- a/src/ltlenv/environment.hh
+++ b/src/ltlenv/environment.hh
@@ -16,11 +16,11 @@ namespace spot
       /// \brief Obtain the formula associated to \a prop_str
       ///
       /// Usually \a prop_str, is the name of an atomic proposition,
-      /// a spot::ltl::require simply returns the associated
+      /// and spot::ltl::require simply returns the associated
       /// spot::ltl::atomic_prop.
       ///
-      /// Note this is not a \c const method.  Some environment will
-      /// "create" the atomic proposition when asked.
+      /// Note this is not a \c const method.  Some environments will
+      /// "create" the atomic proposition when requested.
       ///
       /// We return a spot::ltl::formula instead of an
       /// spot::ltl::atomic_prop, because this
@@ -38,7 +38,7 @@ namespace spot
       virtual
       ~environment()
       {
-      };
+      }
 
       // FIXME: More functions will be needed later, but
       // it's enough for now.