diff --git a/include/libopencm3/stm32/f3/rcc.h b/include/libopencm3/stm32/f3/rcc.h
index 45683499..d034a4b1 100644
--- a/include/libopencm3/stm32/f3/rcc.h
+++ b/include/libopencm3/stm32/f3/rcc.h
@@ -400,7 +400,7 @@ extern const clock_scale_t hsi_8mhz[CLOCK_END];
 
 enum osc {
 	PLL, HSE, HSI, LSE, LSI
-} osc_t;
+};
 
 BEGIN_DECLS