diff --git a/Makefile b/Makefile
index 820032f..49a87e9 100644
--- a/Makefile
+++ b/Makefile
@@ -36,7 +36,7 @@ BUILD_TARGET_sysmocom-alix = "core-image-minimal-initramfs meta-toolchain-osmo t
 
 # Pick the one depending on $@. Not sure if .SECONDEXPANSION is more
 # approiate here or not.
-BUILD_TARGETS=$(BUILD_TARGET_$(CUR_MACHINE))
+BUILD_TARGETS="$(BUILD_TARGET_$(CUR_MACHINE))"
 
 #
 usage: