diff --git a/radio/util/build-companion.sh b/radio/util/build-companion.sh
index 7e3ef68c0..25103460c 100644
--- a/radio/util/build-companion.sh
+++ b/radio/util/build-companion.sh
@@ -5,7 +5,7 @@ set -e
 set -x
 
 cd $1
-SRCDIR = $(pwd)
+SRCDIR=$(pwd)
 
 git fetch
 git checkout next