diff --git a/Src/sx127x.c b/Src/sx127x.c
index 0ca6c4e..6b4134e 100644
--- a/Src/sx127x.c
+++ b/Src/sx127x.c
@@ -8,7 +8,6 @@
 /* Includes */
 #include "sx127x.h"
 #include "spi.h"
-#include "util.h"
 
 /* Definitions */
 /* Common Registers */
@@ -211,6 +210,11 @@
 #define RREG(x) ((x) & SX127X_READ_MASK)
 #define CS_ASSERT() do { sx127x->port->BSRR = sx127x->pin << 16; } while(0)
 #define CS_DEASSERT() do { sx127x->port->BSRR = sx127x->pin; } while(0)
+#define return_if_fail(cond) \
+	if(!(cond)) { return; }
+#define return_val_if_fail(cond, val) \
+	if(!(cond)) { return (val); }
+#define return_null_if_fail(cond) return_val_if_fail((cond), NULL)
 
 /* Private Variables */