diff --git a/naett.c b/naett.c
index 67a90a9..d4b0526 100644
--- a/naett.c
+++ b/naett.c
@@ -630,6 +630,7 @@ void naettPlatformInit(naettInitData initData) {
     }
 
     sessionConfiguration = objc_msgSend_id(class("NSURLSessionConfiguration"), sel("ephemeralSessionConfiguration"));
+    retain(sessionConfiguration);
 }
 
 id NSString(const char* string) {
diff --git a/src/naett_osx.c b/src/naett_osx.c
index c95d37a..68c7099 100644
--- a/src/naett_osx.c
+++ b/src/naett_osx.c
@@ -34,6 +34,7 @@ void naettPlatformInit(naettInitData initData) {
     }
 
     sessionConfiguration = objc_msgSend_id(class("NSURLSessionConfiguration"), sel("ephemeralSessionConfiguration"));
+    retain(sessionConfiguration);
 }
 
 id NSString(const char* string) {