diff --git a/package/open62541/open62541.mk b/package/open62541/open62541.mk
index 671ec3b2dc..66777ce501 100644
--- a/package/open62541/open62541.mk
+++ b/package/open62541/open62541.mk
@@ -27,7 +27,7 @@ OPEN62541_CONF_OPTS += -DUA_NAMESPACE_ZERO=MINIMAL
 else ifeq ($(BR2_PACKAGE_OPEN62541_UA_NAMESPACE_ZERO_REDUCED),y)
 OPEN62541_CONF_OPTS += -DUA_NAMESPACE_ZERO=REDUCED
 else ifeq ($(BR2_PACKAGE_OPEN62541_UA_NAMESPACE_ZERO_FULL),y)
-OPEN62541_CONF_OPTS +=  -DUA_NAMESPACE_ZERO=FULL
+OPEN62541_CONF_OPTS += -DUA_NAMESPACE_ZERO=FULL
 endif
 
 ifeq ($(BR2_PACKAGE_OPEN62541_JSON_ENCODING),y)