diff --git a/boards/common/silabs/Makefile.include b/boards/common/silabs/Makefile.include
index 1554e9b519ea..45e6730dccf6 100644
--- a/boards/common/silabs/Makefile.include
+++ b/boards/common/silabs/Makefile.include
@@ -4,7 +4,7 @@ INCLUDES += -I$(RIOTBOARD)/common/silabs/drivers/include
 PROGRAMMER ?= jlink
 
 export JLINK_DEVICE ?= ${CPU_MODEL}
-export OPENOCD_CONFIG ?= board/efm32.cfg
+OPENOCD_CONFIG ?= board/efm32.cfg
 
 ifeq ($(PROGRAMMER),jlink)
   include $(RIOTMAKE)/tools/jlink.inc.mk