diff --git a/sinqEPICSApp/src/devScalerEL737.c b/sinqEPICSApp/src/devScalerEL737.c
index d5d4441..4ea814e 100644
--- a/sinqEPICSApp/src/devScalerEL737.c
+++ b/sinqEPICSApp/src/devScalerEL737.c
@@ -106,7 +106,7 @@ typedef struct {
     unsigned int dbInit;
 } EL737priv;
 
-static void dummyAsynCallback([[maybe_unused]] asynUser *pasynUser) {}
+static void dummyAsynCallback(asynUser *pasynUser) {}
 
 static void connectSlaveRecords(EL737priv *priv) {
     char slaveName[PVNAME_SZ + 18], errName[256];