diff --git a/src/cas/generic/caNetAddr.h b/src/cas/generic/caNetAddr.h
index e83e6fad2..7248de3f8 100644
--- a/src/cas/generic/caNetAddr.h
+++ b/src/cas/generic/caNetAddr.h
@@ -20,8 +20,6 @@
 #ifndef caNetAddrH
 #define caNetAddrH
 
-#include <stdexcept>
-
 #ifdef caNetAddrSock
 #   ifdef epicsExportSharedSymbols
 #       define epicsExportSharedSymbols_caNetAddrH
@@ -30,11 +28,10 @@
 #   include "osiSock.h"
 #   ifdef epicsExportSharedSymbols_caNetAddrH
 #       define epicsExportSharedSymbols
+#       include "shareLib.h"
 #   endif
 #endif
 
-#include "shareLib.h"
-
 class epicsShareClass caNetAddr {
 public:
     void clear ();
diff --git a/src/cas/generic/casEventMask.h b/src/cas/generic/casEventMask.h
index e10b90e2c..785e0675d 100644
--- a/src/cas/generic/casEventMask.h
+++ b/src/cas/generic/casEventMask.h
@@ -26,9 +26,8 @@
 #include "resourceLib.h"
 #ifdef epicsExportSharedSymbols_casEventMaskH
 #   define epicsExportSharedSymbols
+#   include "shareLib.h"
 #endif
-
-#include "shareLib.h"
  
 class casEventRegistry;
 
diff --git a/src/cas/generic/casdef.h b/src/cas/generic/casdef.h
index 1c7870007..8873ded5c 100644
--- a/src/cas/generic/casdef.h
+++ b/src/cas/generic/casdef.h
@@ -33,12 +33,11 @@
 
 #ifdef epicsExportSharedSymbols_casdefh
 #   define epicsExportSharedSymbols
+#   include "shareLib.h"
 #endif
 
 #include "caNetAddr.h"
 
-#include "shareLib.h"   // EPICS compiler specific sharable lib keywords
-
 typedef aitUint32 caStatus;
 
 /*