diff --git a/.changeset/spicy-knives-play.md b/.changeset/spicy-knives-play.md
new file mode 100644
index 00000000..b348fa3d
--- /dev/null
+++ b/.changeset/spicy-knives-play.md
@@ -0,0 +1,5 @@
+---
+'react-native-app-auth': patch
+---
+
+Fix authorization state parameter in iOS when using custom configuration
diff --git a/ios/RNAppAuth.m b/ios/RNAppAuth.m
index 1dcbd0b5..3ef14c77 100644
--- a/ios/RNAppAuth.m
+++ b/ios/RNAppAuth.m
@@ -348,7 +348,7 @@ - (void)authorizeWithConfiguration: (OIDServiceConfiguration *) configuration
                                                      scope:[OIDScopeUtilities scopesWithArray:scopes]
                                                redirectURL:[NSURL URLWithString:redirectUrl]
                                               responseType:OIDResponseTypeCode
-                                                     state: additionalParameters[@"state"] ? nil : [[self class] generateState]
+                                                     state: additionalParameters[@"state"] ? additionalParameters[@"state"] : [[self class] generateState]
                                                      nonce:nonce
                                               codeVerifier:codeVerifier
                                              codeChallenge:codeChallenge