diff --git a/src/add-ons/kernel/file_systems/udf/UdfStructures.cpp b/src/add-ons/kernel/file_systems/udf/UdfStructures.cpp
index 68e851d04d..175204db8f 100644
--- a/src/add-ons/kernel/file_systems/udf/UdfStructures.cpp
+++ b/src/add-ons/kernel/file_systems/udf/UdfStructures.cpp
@@ -685,8 +685,6 @@ implementation_use_descriptor::dump() const
 // partition_descriptor
 //----------------------------------------------------------------------
 
-const uint8 kMaxPartitionDescriptors = 2;
-
 void
 partition_descriptor::dump() const
 {
diff --git a/src/add-ons/kernel/file_systems/udf/UdfStructures.h b/src/add-ons/kernel/file_systems/udf/UdfStructures.h
index 1f2634ebf6..05d7baff46 100644
--- a/src/add-ons/kernel/file_systems/udf/UdfStructures.h
+++ b/src/add-ons/kernel/file_systems/udf/UdfStructures.h
@@ -935,7 +935,7 @@ private:
 /*! \brief Maximum number of partition descriptors to be found in volume
 	descriptor sequence, per UDF-2.50
 */
-extern const uint8 kMaxPartitionDescriptors;
+const uint8 kMaxPartitionDescriptors = 2;
 #define UDF_MAX_PARTITION_MAPS 2
 #define UDF_MAX_PARTITION_MAP_SIZE 64