diff --git a/doc/classes/PoolByteArray.xml b/doc/classes/PoolByteArray.xml
index b3c99cb944f..bada1545001 100644
--- a/doc/classes/PoolByteArray.xml
+++ b/doc/classes/PoolByteArray.xml
@@ -112,6 +112,7 @@
 			<argument index="0" name="idx" type="int" />
 			<description>
 				Sets the size of the array. If the array is grown, reserves elements at the end of the array. If the array is shrunk, truncates the array to the new size.
+				[b]Note:[/b] Added elements are not automatically initialized to 0 and will contain garbage, i.e. indeterminate values.
 			</description>
 		</method>
 		<method name="set">
diff --git a/doc/classes/PoolIntArray.xml b/doc/classes/PoolIntArray.xml
index 50860985b3d..addd2222380 100644
--- a/doc/classes/PoolIntArray.xml
+++ b/doc/classes/PoolIntArray.xml
@@ -65,6 +65,7 @@
 			<argument index="0" name="idx" type="int" />
 			<description>
 				Sets the size of the array. If the array is grown, reserves elements at the end of the array. If the array is shrunk, truncates the array to the new size.
+				[b]Note:[/b] Added elements are not automatically initialized to 0 and will contain garbage, i.e. indeterminate values.
 			</description>
 		</method>
 		<method name="set">
diff --git a/doc/classes/PoolRealArray.xml b/doc/classes/PoolRealArray.xml
index 8be4f75ef10..984d036c2c3 100644
--- a/doc/classes/PoolRealArray.xml
+++ b/doc/classes/PoolRealArray.xml
@@ -65,6 +65,7 @@
 			<argument index="0" name="idx" type="int" />
 			<description>
 				Sets the size of the array. If the array is grown, reserves elements at the end of the array. If the array is shrunk, truncates the array to the new size.
+				[b]Note:[/b] Added elements are not automatically initialized to 0 and will contain garbage, i.e. indeterminate values.
 			</description>
 		</method>
 		<method name="set">