diff --git a/src/stdlib.make.in b/src/stdlib.make.in
index e6f96cbe94..87a4edb28e 100644
--- a/src/stdlib.make.in
+++ b/src/stdlib.make.in
@@ -10,7 +10,7 @@ LEANMAKE_OPTS=\
 	BIN_OUT="${CMAKE_BINARY_DIR}/bin"\
 	LEAN_OPTS+="${LEAN_EXTRA_MAKE_OPTS} -Dinterpreter.prefer_native=false"\
 	LEANC_OPTS+="${LEANC_OPTS}"\
-	LEAN_CXX="${CMAKE_CXX_COMPILER_LAUNCHER} ${CMAKE_CXX_COMPILER}"
+	LEAN_CXX="${CMAKE_CXX_COMPILER_LAUNCHER} ${CMAKE_CXX_COMPILER}"\
 	MORE_DEPS+="${PREV_STAGE}/bin/lean${CMAKE_EXECUTABLE_SUFFIX}"\
 	CMAKE_LIKE_OUTPUT=1