diff --git a/openair1/PHY/INIT/lte_init_ru.c b/openair1/PHY/INIT/lte_init_ru.c
index e8846d7433..3a1364620e 100644
--- a/openair1/PHY/INIT/lte_init_ru.c
+++ b/openair1/PHY/INIT/lte_init_ru.c
@@ -31,7 +31,7 @@
 #include "assertions.h"
 #include <math.h>
 
-void init_7_5KHz();
+void init_7_5KHz(void);
 
 int phy_init_RU(RU_t *ru) {