diff --git a/code/core/src/main/java/org/apache/tamaya/core/propertysource/BasePropertySource.java b/code/core/src/main/java/org/apache/tamaya/core/propertysource/BasePropertySource.java
index 0a3bc1b..0f74b09 100644
--- a/code/core/src/main/java/org/apache/tamaya/core/propertysource/BasePropertySource.java
+++ b/code/core/src/main/java/org/apache/tamaya/core/propertysource/BasePropertySource.java
@@ -36,7 +36,7 @@
     /** default ordinal that will be used, if no ordinal is provided with the config. */
     private int defaultOrdinal;
     /** Used if the ordinal has been setCurrent explicitly. */
-    private volatile Integer ordinal;
+    private Integer ordinal;
     /** The name of the property source. */
     private String name;
 
diff --git a/code/spi-support/src/main/java/org/apache/tamaya/spisupport/propertysource/BasePropertySource.java b/code/spi-support/src/main/java/org/apache/tamaya/spisupport/propertysource/BasePropertySource.java
index 51a0a24..d0106aa 100644
--- a/code/spi-support/src/main/java/org/apache/tamaya/spisupport/propertysource/BasePropertySource.java
+++ b/code/spi-support/src/main/java/org/apache/tamaya/spisupport/propertysource/BasePropertySource.java
@@ -36,7 +36,7 @@
     /** default ordinal that will be used, if no ordinal is provided with the config. */
     private int defaultOrdinal;
     /** Used if the ordinal has been setCurrent explicitly. */
-    private volatile Integer ordinal;
+    private Integer ordinal;
     /** The name of the property source. */
     private String name;
     /** The optional prefix. */