diff --git a/src/libCom/misc/epicsStrtod.c b/src/libCom/misc/epicsStrtod.c
index deb362b65..9977670fd 100644
--- a/src/libCom/misc/epicsStrtod.c
+++ b/src/libCom/misc/epicsStrtod.c
@@ -18,6 +18,9 @@
 #define epicsExportSharedSymbols
 #include "epicsStdlib.h"
 
+#ifdef epicsStrtod
+# undef epicsStrtod
+#endif
 
 epicsShareFunc double epicsShareAPI epicsStrtod( 
     const char *str, char **endp)