diff --git a/expat/Changes b/expat/Changes
index 45e45dd3..578a48d7 100644
--- a/expat/Changes
+++ b/expat/Changes
@@ -12,6 +12,8 @@ Release 2.4.2 xxx xxx xx xxxx
             #495  CMake: MinGW: Fix pkg-config section "Libs" for
                     - non-release build types (e.g. -DCMAKE_BUILD_TYPE=Debug)
                     - multi-config CMake generators (e.g. Ninja Multi-Config)
+       #522 #523  docs: Fix return value docs for both
+                    XML_SetBillionLaughsAttackProtection* functions
 
         Special thanks to:
             Dong-hee Na
diff --git a/expat/doc/reference.html b/expat/doc/reference.html
index 261c7a3d..bfea3b25 100644
--- a/expat/doc/reference.html
+++ b/expat/doc/reference.html
@@ -2102,7 +2102,7 @@ XML_SetBillionLaughsAttackProtectionMaximumAmplification(XML_Parser p,
     <a href="https://en.wikipedia.org/wiki/Billion_laughs_attack">billion laughs attacks</a>
     (default: <code>100.0</code>)
     of parser <code>p</code> to <code>maximumAmplificationFactor</code>, and
-    returns <code>XML_TRUE</code> upon success and <code>XML_TRUE</code> upon error.
+    returns <code>XML_TRUE</code> upon success and <code>XML_FALSE</code> upon error.
   </p>
 
   The amplification factor is calculated as ..
@@ -2152,7 +2152,7 @@ XML_SetBillionLaughsAttackProtectionActivationThreshold(XML_Parser p,
     <a href="https://en.wikipedia.org/wiki/Billion_laughs_attack">billion laughs attacks</a>
     (default: <code>8 MiB</code>)
     of parser <code>p</code> to <code>activationThresholdBytes</code>, and
-    returns <code>XML_TRUE</code> upon success and <code>XML_TRUE</code> upon error.
+    returns <code>XML_TRUE</code> upon success and <code>XML_FALSE</code> upon error.
   </p>
 
   <p>For a call to <code>XML_SetBillionLaughsAttackProtectionActivationThreshold</code> to succeed:</p>