diff --git a/Makefile b/Makefile
index dcda8fe024..4db971b0cd 100644
--- a/Makefile
+++ b/Makefile
@@ -402,6 +402,7 @@ unexport QMAKESPEC
 unexport TERMINFO
 unexport MACHINE
 unexport O
+unexport GCC_COLORS
 
 GNU_HOST_NAME := $(shell support/gnuconfig/config.guess)