diff --git a/driver/src/main/java/com/consol/citrus/db/driver/statement/StatementComposer.java b/driver/src/main/java/com/consol/citrus/db/driver/statement/StatementComposer.java
index 0463b4a..c9650f0 100644
--- a/driver/src/main/java/com/consol/citrus/db/driver/statement/StatementComposer.java
+++ b/driver/src/main/java/com/consol/citrus/db/driver/statement/StatementComposer.java
@@ -34,13 +34,23 @@ String composeStatement(final String statement, final StatementParameters parame
 
     private Collection<Object> determineParameterOrder(final String statement,
                                                        final StatementParameters parameters) {
-        final Pattern parameterPattern = Pattern.compile("(:[a-zA-Z]+|\\?)");
+        /*
+            Regex explanation:
+            The intended group to catch is the group of variables in the sql statement.
+            In case of a callable statement, it is possible that the statement starts with a '? = '
+            indicating a out parameter of the statement. This parameter should be ignored concerning variable
+            replacement. That is why the first group catches the '? = ' (if existing) and the second group catches
+            named and unnamed variable references within the rest of the sql statement.
+            This is why the first group should be ignored due variable substitution while the second group contains all
+            variables to replace
+         */
+        final Pattern parameterPattern = Pattern.compile("^(\\? ?=)+|(:[a-zA-Z]+|\\?)");
         final Matcher parameterMatcher = parameterPattern.matcher(statement);
 
         final LinkedList<Object> orderedParameterList = new LinkedList<>();
 
         for(int matchIndex = 1; parameterMatcher.find(); matchIndex++){
-            final String parameterPlaceholder = parameterMatcher.group(1);
+            final String parameterPlaceholder = parameterMatcher.group(2);
             if(parameterPlaceholder != null) {
                 orderedParameterList.add(
                         getParameterValue(parameters, parameterPlaceholder, matchIndex));
diff --git a/driver/src/test/java/com/consol/citrus/db/driver/statement/StatementComposerTest.java b/driver/src/test/java/com/consol/citrus/db/driver/statement/StatementComposerTest.java
index 50d207c..0540725 100644
--- a/driver/src/test/java/com/consol/citrus/db/driver/statement/StatementComposerTest.java
+++ b/driver/src/test/java/com/consol/citrus/db/driver/statement/StatementComposerTest.java
@@ -91,4 +91,35 @@ public void testNoVariableMappingPreservesPlaceholder(){
         //THEN
         assertEquals(composedStatement, expectedComposedStatement);
     }
+
+    @Test
+    public void TestCallableStatementParameterAreReplacedCorrectly(){
+
+        //GIVEN
+        final String statement = "CALL someClobFunction(?,:foo)";
+        final StatementParameters statementParameters = new StatementParameters();
+        statementParameters.setParameter("foo", "bar");
+        statementParameters.setParameter(1, "foobar");
+        final String expectedComposedStatement = statement + " - (foobar,bar)";
+
+        //WHEN
+        final String composedStatement = statementComposer.composeStatement(statement, statementParameters);
+
+        //THEN
+        assertEquals(composedStatement, expectedComposedStatement);
+    }
+
+    @Test
+    public void testReturnValuesOfCallableStatementsAreParsedCorrectly(){
+
+        //GIVEN
+        final String statement = "? = CALL someFunction(?)";
+        final String expectedComposedStatement = statement + " - (?)";
+
+        //WHEN
+        final String composedStatement = statementComposer.composeStatement(statement, new StatementParameters());
+
+        //THEN
+        assertEquals(composedStatement, expectedComposedStatement);
+    }
 }
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