diff --git a/cpu/stm32f3/periph/pwm.c b/cpu/stm32f3/periph/pwm.c
index 091dd4d6e..f38c988a2 100644
--- a/cpu/stm32f3/periph/pwm.c
+++ b/cpu/stm32f3/periph/pwm.c
@@ -125,7 +125,7 @@ int pwm_init(pwm_t dev, pwm_mode_t mode, unsigned int frequency, unsigned int re
     /* enable PWM generation */
     pwm_start(dev);
 
-    return 0;
+    return frequency;
 }
 
 int pwm_set(pwm_t dev, int channel, unsigned int value)