diff --git a/bsp/efm32/EFM32GG_DK3750/SConscript b/bsp/efm32/EFM32GG_DK3750/SConscript
index 9a5db65b6cb80228cc0050b3fb9d2f963a1b934d..a27effcef9f296b63b81e576e44fc3efb692acb4 100644
--- a/bsp/efm32/EFM32GG_DK3750/SConscript
+++ b/bsp/efm32/EFM32GG_DK3750/SConscript
@@ -8,4 +8,5 @@ if rtconfig.EFM32_BOARD == 'EFM32GG_DK3750':
     group = DefineGroup('EFM32GG_DK3750', src, depend = [''], CPPPATH = CPPPATH)
     Return('group')
 else:
-    Return('')
\ No newline at end of file
+    empty = []
+    Return('empty')
diff --git a/bsp/efm32/EFM32_Gxxx_DK/SConscript b/bsp/efm32/EFM32_Gxxx_DK/SConscript
index d5528ab5e7e96ae7fd7cbf711b2d918274223d34..19552696aa0f839df921405996e378ee015f5313 100644
--- a/bsp/efm32/EFM32_Gxxx_DK/SConscript
+++ b/bsp/efm32/EFM32_Gxxx_DK/SConscript
@@ -8,4 +8,5 @@ if rtconfig.EFM32_BOARD == 'EFM32_GXXX_DK':
     group = DefineGroup('EFM32_GXXX_DK', src, depend = [''], CPPPATH = CPPPATH)
     Return('group')
 else:
-    Return('')
\ No newline at end of file
+    empty = []
+    Return('empty')