diff --git a/package/bubblewrap/bubblewrap.mk b/package/bubblewrap/bubblewrap.mk
index dcc3c23d7c..a58d7fd143 100644
--- a/package/bubblewrap/bubblewrap.mk
+++ b/package/bubblewrap/bubblewrap.mk
@@ -18,7 +18,7 @@ define BUBBLEWRAP_LINUX_CONFIG_FIXUPS
 endef
 
 BUBBLEWRAP_CONF_OPTS = \
-	-Dassume_kernel=$(LINUX_VERSION_PROBED) \
+	-Dassume_kernel=$(shell echo $(LINUX_VERSION_PROBED) | grep -o '^[0-9]\+\.[0-9]\+\.[0-9]\+') \
 	-Dzsh_completion=disabled \
 	-Dman=disabled \
 	-Dpython=$(HOST_DIR)/bin/python \