diff --git a/log4j-core-test/src/test/java/org/apache/logging/log4j/core/filter/RegexFilterTest.java b/log4j-core-test/src/test/java/org/apache/logging/log4j/core/filter/RegexFilterTest.java
index a3e8bf3d025..9a1915f662b 100644
--- a/log4j-core-test/src/test/java/org/apache/logging/log4j/core/filter/RegexFilterTest.java
+++ b/log4j-core-test/src/test/java/org/apache/logging/log4j/core/filter/RegexFilterTest.java
@@ -18,6 +18,7 @@
 
 import static org.hamcrest.CoreMatchers.equalTo;
 import static org.hamcrest.MatcherAssert.assertThat;
+import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
 import static org.junit.jupiter.api.Assertions.assertNull;
 import static org.junit.jupiter.api.Assertions.assertSame;
 import static org.junit.jupiter.api.Assertions.assertTrue;
@@ -110,4 +111,11 @@ public void testParameterizedMsg() throws Exception {
         final Result fmtResult = fmtFilter.filter(null, null, null, msg, params);
         assertThat(fmtResult, equalTo(Result.ACCEPT));
     }
+
+    @Test
+    void testRegexFilterDoesNotThrowWithAllTheParametersExceptRegexEqualNull() {
+        assertDoesNotThrow(() -> {
+            RegexFilter.createFilter(".* test .*", null, null, null, null);
+        });
+    }
 }
diff --git a/log4j-core/src/main/java/org/apache/logging/log4j/core/filter/RegexFilter.java b/log4j-core/src/main/java/org/apache/logging/log4j/core/filter/RegexFilter.java
index 400bd42e01e..60890f0ff8f 100644
--- a/log4j-core/src/main/java/org/apache/logging/log4j/core/filter/RegexFilter.java
+++ b/log4j-core/src/main/java/org/apache/logging/log4j/core/filter/RegexFilter.java
@@ -139,7 +139,11 @@ public static RegexFilter createFilter(
             LOGGER.error("A regular expression must be provided for RegexFilter");
             return null;
         }
-        return new RegexFilter(useRawMsg, Pattern.compile(regex, toPatternFlags(patternFlags)), onMatch, onMismatch);
+        return new RegexFilter(
+                Boolean.TRUE.equals(useRawMsg),
+                Pattern.compile(regex, toPatternFlags(patternFlags)),
+                onMatch,
+                onMismatch);
     }
 
     private static int toPatternFlags(final String[] patternFlags)