diff --git a/Makefile b/Makefile
index c462bb1d4f..f1c98aa933 100644
--- a/Makefile
+++ b/Makefile
@@ -208,6 +208,7 @@ unexport CXXFLAGS
 unexport GREP_OPTIONS
 unexport CONFIG_SITE
 unexport QMAKESPEC
+unexport TERMINFO
 
 GNU_HOST_NAME:=$(shell support/gnuconfig/config.guess)