diff --git a/drivers/Makefile.include b/drivers/Makefile.include
index 5d85191636..9f915b3cd1 100644
--- a/drivers/Makefile.include
+++ b/drivers/Makefile.include
@@ -119,7 +119,7 @@ ifneq (,$(filter sdcard_spi,$(USEMODULE)))
   USEMODULE_INCLUDES += $(RIOTBASE)/drivers/sdcard_spi/include
 endif
 ifneq (,$(filter soft_spi,$(USEMODULE)))
-    USEMODULE_INCLUDES += $(RIOTBASE)/drivers/soft_spi/include
+  USEMODULE_INCLUDES += $(RIOTBASE)/drivers/soft_spi/include
 endif
 ifneq (,$(filter veml6070,$(USEMODULE)))
   USEMODULE_INCLUDES += $(RIOTBASE)/drivers/veml6070/include