diff --git a/proguard-rules.pro b/proguard-rules.pro
index 0e1c37616..ea7794569 100644
--- a/proguard-rules.pro
+++ b/proguard-rules.pro
@@ -15,4 +15,5 @@
 # CoordinatorLayout resolves the behaviors of its child components with reflection.
 -keep public class * extends android.support.design.widget.CoordinatorLayout$Behavior {
     public <init>(android.content.Context, android.util.AttributeSet);
+    public <init>();
 }