diff --git a/src/libCom/sCalcPostfix.h b/src/libCom/sCalcPostfix.h
index 73ce109e8..8dce9b4f6 100644
--- a/src/libCom/sCalcPostfix.h
+++ b/src/libCom/sCalcPostfix.h
@@ -37,8 +37,9 @@
 #define		BAD_EXPRESSION	0
 #define		END_STACK	127
 
-long epicsShareAPI sCalcPostfix (char *pinfix, 
+epicsShareFunc long epicsShareAPI sCalcPostfix (char *pinfix, 
         char **pp_postfix, short *perror);
+
 epicsShareFunc long epicsShareAPI 
 	sCalcPerform (double *parg, int numArgs, 
     char **psarg, int numSArgs, double *presult,