diff --git a/src/gdd/aitGen.c b/src/gdd/aitGen.c
index f2cc29124..b60780adf 100644
--- a/src/gdd/aitGen.c
+++ b/src/gdd/aitGen.c
@@ -24,6 +24,8 @@
 #define epicsExportSharedSymbols
 #include "aitTypes.h"
 
+void initMinMaxAIT ( void );
+
 /*
  * maximum value for each type - joh
  */