diff --git a/keras/layers/reshaping/cropping2d.py b/keras/layers/reshaping/cropping2d.py
index 05bb82bc4c8..867ea0512bf 100644
--- a/keras/layers/reshaping/cropping2d.py
+++ b/keras/layers/reshaping/cropping2d.py
@@ -57,6 +57,11 @@ def __init__(self, cropping=((0, 0), (0, 0)), data_format=None, **kwargs):
         super().__init__(**kwargs)
         self.data_format = backend.standardize_data_format(data_format)
         if isinstance(cropping, int):
+            if cropping < 0:
+                raise ValueError(
+                    "`cropping` cannot be negative. "
+                    f"Received: cropping={cropping}."
+                )
             self.cropping = ((cropping, cropping), (cropping, cropping))
         elif hasattr(cropping, "__len__"):
             if len(cropping) != 2:
diff --git a/keras/layers/reshaping/cropping3d.py b/keras/layers/reshaping/cropping3d.py
index ee55e886c02..7c415595ca9 100644
--- a/keras/layers/reshaping/cropping3d.py
+++ b/keras/layers/reshaping/cropping3d.py
@@ -62,6 +62,11 @@ def __init__(
         super().__init__(**kwargs)
         self.data_format = backend.standardize_data_format(data_format)
         if isinstance(cropping, int):
+            if cropping < 0:
+                raise ValueError(
+                    "`cropping` cannot be negative. "
+                    f"Received: cropping={cropping}."
+                )
             self.cropping = (
                 (cropping, cropping),
                 (cropping, cropping),