diff --git a/release/arm/RPI-B.conf b/release/arm/RPI-B.conf
index 0cf2b46ea7a5..1b3212af0b0e 100644
--- a/release/arm/RPI-B.conf
+++ b/release/arm/RPI-B.conf
@@ -15,7 +15,7 @@ MD_ARGS="-x 63 -y 255"
 NODOC=1
 UBOOT_DIR="/usr/local/share/u-boot/u-boot-rpi"
 RPI_FIRMWARE_DIR="/usr/local/share/rpi-firmware"
-OL_DIR=$"{RPI_FIRMWARE_DIR}/overlays"
+OL_DIR="${RPI_FIRMWARE_DIR}/overlays"
 OVERLAYS="mmc.dtbo pi3-disable-bt.dtbo"
 PART_SCHEME="MBR"
 
diff --git a/release/arm/RPI2.conf b/release/arm/RPI2.conf
index ffee1de4472a..f2917264c6b2 100644
--- a/release/arm/RPI2.conf
+++ b/release/arm/RPI2.conf
@@ -15,7 +15,7 @@ MD_ARGS="-x 63 -y 255"
 NODOC=1
 UBOOT_DIR="/usr/local/share/u-boot/u-boot-rpi2"
 RPI_FIRMWARE_DIR="/usr/local/share/rpi-firmware"
-OL_DIR=$"{RPI_FIRMWARE_DIR}/overlays"
+OL_DIR="${RPI_FIRMWARE_DIR}/overlays"
 OVERLAYS="mmc.dtbo"
 PART_SCHEME="MBR"
 export BOARDNAME="RPI2"