diff --git a/backends/AnalyseAsm.hs b/backends/AnalyseAsm.hs
index 70afbf9..bf26924 100644
--- a/backends/AnalyseAsm.hs
+++ b/backends/AnalyseAsm.hs
@@ -57,8 +57,8 @@ parseAsmLine s
 
         -- The x86 stack goes downwards, so subl makes the stack deeper.
         ["subl", '$':arg, "%esp"] -> parseInc arg
-        -- ... but GCC will sometimes generate "addl $-n" rather than "subl
-        -- $n".
+        -- ... but GCC will sometimes generate "addl \$-n" rather than "subl
+        -- \$n".
         ["addl", '$':'-':arg, "%esp"] -> parseInc arg
         -- A plain push also makes the stack deeper.
         ("pushl":_) -> Just $ AsmStackInc 4
diff --git a/data/AST.hs b/data/AST.hs
index fdcb4b1..5150758 100644
--- a/data/AST.hs
+++ b/data/AST.hs
@@ -366,7 +366,7 @@ data Choice = Choice Meta Expression Process
 
 -- | A guard in an @ALT@.
 data Alternative =
-  -- | A plain/conditional guard.
+  -- | A plain or conditional guard.
   -- The channel or timer is the 'Variable', and the destination (or @AFTER@
   -- clause) is inside the 'InputMode'. The process is the body of the guard.
   -- The 'Expression' is the pre-condition.