diff --git a/systray_darwin.m b/systray_darwin.m
index 200d793..f1dc7ac 100644
--- a/systray_darwin.m
+++ b/systray_darwin.m
@@ -159,6 +159,7 @@ void runInMainThread(SEL method, id object) {
 void setIcon(const char* iconBytes, int length) {
   NSData* buffer = [NSData dataWithBytes: iconBytes length:length];
   NSImage *image = [[NSImage alloc] initWithData:buffer];
+  [image setSize:NSMakeSize(16, 16)];
   runInMainThread(@selector(setIcon:), (id)image);
 }