diff --git a/src/Modal.js b/src/Modal.js
index 82d8d93b1..3be845dc6 100644
--- a/src/Modal.js
+++ b/src/Modal.js
@@ -277,7 +277,7 @@ class Modal extends React.Component {
       const modalOpenClassNameRegex = new RegExp(`(^| )${modalOpenClassName}( |$)`);
       document.body.className = document.body.className.replace(modalOpenClassNameRegex, ' ').trim();
     }
-    Modal.openCount -= 1;
+    Modal.openCount = Math.max(0, Modal.openCount - 1);
 
     setScrollbarWidth(this._originalBodyPadding);
   }