diff --git a/cpu/efm32/Makefile.features b/cpu/efm32/Makefile.features
index 66023f428c..7cb09e64ed 100644
--- a/cpu/efm32/Makefile.features
+++ b/cpu/efm32/Makefile.features
@@ -9,7 +9,7 @@ FEATURES_PROVIDED += periph_gpio periph_gpio_irq
 FEATURES_CONFLICT += periph_rtc:periph_rtt
 FEATURES_CONFLICT_MSG += "On the EFM32, the RTC and RTT map to the same hardware peripheral."
 
-ifeq (1,$(EFM32_TNRG))
+ifeq (1,$(EFM32_TRNG))
   FEATURES_PROVIDED += periph_hwrng
 endif