diff --git a/src/config/functions.ts b/src/config/functions.ts
index b777fe05..6bf85c5a 100644
--- a/src/config/functions.ts
+++ b/src/config/functions.ts
@@ -45,7 +45,7 @@ export const fnSchema = {
 				// FIXME: We should be mounting the following file into the supervisor from the
 				// start-resin-supervisor script, changed in meta-resin - but until then, hardcode it
 				const data = await fs.readFile(
-					`${constants.bootMountPoint}/device-type.json`,
+					`${constants.rootMountPoint}${constants.bootMountPoint}/device-type.json`,
 					'utf8',
 				);
 				const deviceInfo = JSON.parse(data);
@@ -64,7 +64,7 @@ export const fnSchema = {
 				// FIXME: We should be mounting the following file into the supervisor from the
 				// start-resin-supervisor script, changed in meta-resin - but until then, hardcode it
 				const data = await fs.readFile(
-					`${constants.bootMountPoint}/device-type.json`,
+					`${constants.rootMountPoint}${constants.bootMountPoint}/device-type.json`,
 					'utf8',
 				);
 				const deviceInfo = JSON.parse(data);
diff --git a/test/03-config.spec.ts b/test/03-config.spec.ts
index ab9aec46..7a985239 100644
--- a/test/03-config.spec.ts
+++ b/test/03-config.spec.ts
@@ -151,7 +151,7 @@ describe('Config', () => {
 			expect(deviceArch).to.equal(arch);
 			expect(fs.readFile).to.be.calledOnce;
 			expect(fs.readFile).to.be.calledWith(
-				`${constants.bootMountPoint}/device-type.json`,
+				`${constants.rootMountPoint}${constants.bootMountPoint}/device-type.json`,
 				'utf8',
 			);
 
@@ -171,7 +171,7 @@ describe('Config', () => {
 			expect(deviceType).to.equal(slug);
 			expect(fs.readFile).to.be.calledOnce;
 			expect(fs.readFile).to.be.calledWith(
-				`${constants.bootMountPoint}/device-type.json`,
+				`${constants.rootMountPoint}${constants.bootMountPoint}/device-type.json`,
 				'utf8',
 			);