diff --git a/src/libCom/calc/calcPerform.c b/src/libCom/calc/calcPerform.c
index f6b9eda5c..729bed3d3 100644
--- a/src/libCom/calc/calcPerform.c
+++ b/src/libCom/calc/calcPerform.c
@@ -112,7 +112,7 @@
 #include	"postfix.h"
 #include	"postfixPvt.h"
 
-static double	local_random();
+static double	local_random(void);
 
 #define	NOT_SET		0
 #define	TRUE_COND	1
diff --git a/src/libCom/calc/sCalcPerform.c b/src/libCom/calc/sCalcPerform.c
index 458c63398..41aa7cef0 100644
--- a/src/libCom/calc/sCalcPerform.c
+++ b/src/libCom/calc/sCalcPerform.c
@@ -70,7 +70,7 @@
 #include	"sCalcPostfix.h"
 #include	"sCalcPostfixPvt.h"
 
-static double	local_random();
+static double	local_random(void);
 
 static int isnan(double d)
 {