diff --git a/src/ca/caDiagnostics.h b/src/ca/caDiagnostics.h
index c63bba6de..90221e1ed 100644
--- a/src/ca/caDiagnostics.h
+++ b/src/ca/caDiagnostics.h
@@ -21,7 +21,7 @@ enum appendNumberFlag {appendNumber, dontAppendNumber};
 int catime ( const char *channelName, unsigned channelCount, enum appendNumberFlag appNF );
 
 int acctst ( const char *pname, unsigned logggingInterestLevel, 
-            unsigned channelCount, unsigned repititionCount, 
+            unsigned channelCount, unsigned repetitionCount, 
             enum ca_preemptive_callback_select select );
 
 #define CATIME_OK 0