diff --git a/firmware/sgpio-rx/sgpio-rx.c b/firmware/sgpio-rx/sgpio-rx.c
index 9b3f258f..284c1d69 100644
--- a/firmware/sgpio-rx/sgpio-rx.c
+++ b/firmware/sgpio-rx/sgpio-rx.c
@@ -271,11 +271,11 @@ int main(void) {
 	enable_1v8_power();
 	cpu_clock_init();
 
-	CGU_BASE_PERIPH_CLK = (CGU_BASE_CLK_AUTOBLOCK
-			| (CGU_SRC_PLL1 << CGU_BASE_CLK_SEL_SHIFT));
+	CGU_BASE_PERIPH_CLK = CGU_BASE_PERIPH_CLK_AUTOBLOCK
+			| CGU_BASE_PERIPH_CLK_CLK_SEL(CGU_SRC_PLL1);
 
-	CGU_BASE_APB1_CLK = (CGU_BASE_CLK_AUTOBLOCK
-			| (CGU_SRC_PLL1 << CGU_BASE_CLK_SEL_SHIFT));
+	CGU_BASE_APB1_CLK = CGU_BASE_APB1_CLK_AUTOBLOCK
+			| CGU_BASE_APB1_CLK_CLK_SEL(CGU_SRC_PLL1);
 	
     ssp1_init();
 	ssp1_set_mode_max2837();
diff --git a/firmware/sgpio/sgpio.c b/firmware/sgpio/sgpio.c
index 2df82c05..5d17238d 100644
--- a/firmware/sgpio/sgpio.c
+++ b/firmware/sgpio/sgpio.c
@@ -243,11 +243,11 @@ int main(void) {
 	cpu_clock_init();
 	ssp1_init();
 
-	CGU_BASE_PERIPH_CLK = (CGU_BASE_CLK_AUTOBLOCK
-			| (CGU_SRC_PLL1 << CGU_BASE_CLK_SEL_SHIFT));
+	CGU_BASE_PERIPH_CLK = CGU_BASE_PERIPH_CLK_AUTOBLOCK
+			| CGU_BASE_PERIPH_CLK_CLK_SEL(CGU_SRC_PLL1);
 
-	CGU_BASE_APB1_CLK = (CGU_BASE_CLK_AUTOBLOCK
-			| (CGU_SRC_PLL1 << CGU_BASE_CLK_SEL_SHIFT));
+	CGU_BASE_APB1_CLK = CGU_BASE_APB1_CLK_AUTOBLOCK
+			| CGU_BASE_APB1_CLK_CLK_SEL(CGU_SRC_PLL1);
 
 	gpio_set(PORT_LED1_3, PIN_LED1);