diff --git a/java/ql/lib/change-notes/2023-07-12-apache-commons-lang3-tostringbuilder.md b/java/ql/lib/change-notes/2023-07-12-apache-commons-lang3-tostringbuilder.md
new file mode 100644
index 000000000000..e9739ee48862
--- /dev/null
+++ b/java/ql/lib/change-notes/2023-07-12-apache-commons-lang3-tostringbuilder.md
@@ -0,0 +1,4 @@
+---
+category: minorAnalysis
+---
+* Added models for Apache Commons Lang3 `ToStringBuilder.reflectionToString` method.
diff --git a/java/ql/lib/ext/org.apache.commons.lang3.builder.model.yml b/java/ql/lib/ext/org.apache.commons.lang3.builder.model.yml
index 654eb626d849..8bb0de9bb1a0 100644
--- a/java/ql/lib/ext/org.apache.commons.lang3.builder.model.yml
+++ b/java/ql/lib/ext/org.apache.commons.lang3.builder.model.yml
@@ -19,4 +19,5 @@ extensions:
       - ["org.apache.commons.lang3.builder", "ToStringBuilder", False, "appendToString", "", "", "Argument[0]", "Argument[this]", "taint", "manual"]
       - ["org.apache.commons.lang3.builder", "ToStringBuilder", False, "build", "", "", "Argument[this]", "ReturnValue", "taint", "manual"]
       - ["org.apache.commons.lang3.builder", "ToStringBuilder", False, "getStringBuffer", "", "", "Argument[this]", "ReturnValue", "taint", "manual"]
+      - ["org.apache.commons.lang3.builder", "ToStringBuilder", False, "reflectionToString", "", "", "Argument[0]", "ReturnValue", "taint", "manual"]
       - ["org.apache.commons.lang3.builder", "ToStringBuilder", False, "toString", "", "", "Argument[this]", "ReturnValue", "taint", "manual"]