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-rw-r--r--build-aux/Makefile.tail.mk2
1 files changed, 1 insertions, 1 deletions
diff --git a/build-aux/Makefile.tail.mk b/build-aux/Makefile.tail.mk
index aeba2d1b09..2e4adc611b 100644
--- a/build-aux/Makefile.tail.mk
+++ b/build-aux/Makefile.tail.mk
@@ -22,7 +22,7 @@ _at.tmp_subdirs := $(call at.addprefix,$(outdir),$(at.subdirs))
# Clean the environment
$(eval \
- $(foreach _at.tmp_variable,$(filter-out _at.tmp_variable $(_at.VARIABLES),$(.VARIABLES)),\
+ $(foreach _at.tmp_variable,$(filter-out $(call _at.quote-pattern,_at.tmp_variable $(_at.VARIABLES)),$(.VARIABLES)),\
$(call _at.target_variable,$(_at.tmp_targets),$(_at.tmp_variable))$(at.nl)\
undefine $(_at.tmp_variable)$(at.nl)))