diff --git a/meta/classes/sign_rpm.bbclass b/meta/classes/sign_rpm.bbclass
index ee0c4808fa..b5b21b0db1 100644
--- a/meta/classes/sign_rpm.bbclass
+++ b/meta/classes/sign_rpm.bbclass
@@ -33,7 +33,7 @@
 
 inherit sanity
 
-RPM_SIGN_PACKAGES='1'
+RPM_SIGN_PACKAGES = '1'
 RPM_SIGN_FILES ?= '0'
 RPM_GPG_BACKEND ?= 'local'
 # SHA-256 is used by default