diff --git a/src/ca/caDiagnostics.h b/src/ca/caDiagnostics.h
index 31691a7bb..c63bba6de 100644
--- a/src/ca/caDiagnostics.h
+++ b/src/ca/caDiagnostics.h
@@ -18,9 +18,9 @@ extern "C" {
 #endif
 
 enum appendNumberFlag {appendNumber, dontAppendNumber};
-int catime ( char *channelName, unsigned channelCount, enum appendNumberFlag appNF );
+int catime ( const char *channelName, unsigned channelCount, enum appendNumberFlag appNF );
 
-int acctst ( char *pname, unsigned logggingInterestLevel, 
+int acctst ( const char *pname, unsigned logggingInterestLevel, 
             unsigned channelCount, unsigned repititionCount, 
             enum ca_preemptive_callback_select select );
 
diff --git a/src/ca/catime.c b/src/ca/catime.c
index ddac38218..faaa4b69e 100644
--- a/src/ca/catime.c
+++ b/src/ca/catime.c
@@ -494,7 +494,8 @@ LOCAL void test ( ti *pItems, unsigned iterations )
 /*
  * catime ()
  */
-int catime ( char *channelName, unsigned channelCount, enum appendNumberFlag appNF )
+int catime ( const char * channelName, 
+    unsigned channelCount, enum appendNumberFlag appNF )
 {
     unsigned    i;
     unsigned    strsize;