diff --git a/fmmd_design_aide/fmmd_design_aide.tex b/fmmd_design_aide/fmmd_design_aide.tex
index aa7582e..cbed15f 100644
--- a/fmmd_design_aide/fmmd_design_aide.tex
+++ b/fmmd_design_aide/fmmd_design_aide.tex
@@ -31,7 +31,7 @@ of its failure mode behaviour.
 A feature of FMMD analysis is symptom collection. Common symptoms are collected
 after analysis, and this means that the failure modes of the {\fg}
 are examined. The symptoms will be detectable (like a value of  of range)
-or undetectable (like a logic state of value being incorrect).
+or undetectable (like a logic state or value being incorrect).
 The `undetectable' failure modes are the most worrying for thesafety critical designer.
 It is these that are, generally the ones that stand out as single 
 failure modes. For instance, out of range values, we know we can cope with; they