diff --git a/src/Magnum/Platform/GlfwApplication.h b/src/Magnum/Platform/GlfwApplication.h
index fc16345e2..2c9a4e37c 100644
--- a/src/Magnum/Platform/GlfwApplication.h
+++ b/src/Magnum/Platform/GlfwApplication.h
@@ -575,7 +575,7 @@ class GlfwApplication {
         #ifdef MAGNUM_TARGET_GL
         Containers::Pointer<Platform::GLContext> _context;
         #endif
-        int _exitCode;
+        int _exitCode = 0;
 
         Vector2i _minWindowSize;
         Vector2i _maxWindowSize;
diff --git a/src/Magnum/Platform/Sdl2Application.h b/src/Magnum/Platform/Sdl2Application.h
index 942c25f9d..1d6fed5d6 100644
--- a/src/Magnum/Platform/Sdl2Application.h
+++ b/src/Magnum/Platform/Sdl2Application.h
@@ -1039,7 +1039,7 @@ class Sdl2Application {
 
         Flags _flags;
 
-        int _exitCode;
+        int _exitCode = 0;
 };
 
 #ifdef MAGNUM_TARGET_GL