diff --git a/src/SSLInvalidCertificateException.h b/src/SSLInvalidCertificateException.h
index 5e01af8..cb82170 100644
--- a/src/SSLInvalidCertificateException.h
+++ b/src/SSLInvalidCertificateException.h
@@ -30,7 +30,7 @@
 }
 
 #ifdef OF_HAVE_PROPERTIES
-@property (readonly, assign) OFString *reason;
+@property (readonly, copy) OFString *reason;
 #endif
 
 + exceptionWithReason: (OFString*)reason;
diff --git a/src/SSLInvalidCertificateException.m b/src/SSLInvalidCertificateException.m
index bdaca18..1520299 100644
--- a/src/SSLInvalidCertificateException.m
+++ b/src/SSLInvalidCertificateException.m
@@ -74,6 +74,6 @@
 
 - (OFString*)reason
 {
-	OF_GETTER(_reason, false)
+	OF_GETTER(_reason, true)
 }
 @end