diff --git a/include/libopencm3/stm32/f3/rcc.h b/include/libopencm3/stm32/f3/rcc.h
index c9a3d2c8..e9bbf82a 100644
--- a/include/libopencm3/stm32/f3/rcc.h
+++ b/include/libopencm3/stm32/f3/rcc.h
@@ -98,7 +98,6 @@
 #define RCC_CFGR_PLLMUL_PLL_IN_CLK_X14		0xC
 #define RCC_CFGR_PLLMUL_PLL_IN_CLK_X15		0xD
 #define RCC_CFGR_PLLMUL_PLL_IN_CLK_X16		0xE
-//#define RCC_CFGR_PLLMUL_PLL_IN_CLK_X16	0xF
 #define RCC_CFGR_PLLMUL_MASK (0xF << RCC_CFGR_PLLMUL_SHIFT)
 
 /* PPRE2: APB high-speed prescaler (APB2) */