diff --git a/pytorch3d/ops/graph_conv.py b/pytorch3d/ops/graph_conv.py
index a43eeb3a..394266ee 100644
--- a/pytorch3d/ops/graph_conv.py
+++ b/pytorch3d/ops/graph_conv.py
@@ -114,6 +114,10 @@ def gather_scatter_python(input, edges, directed: bool = False):
         raise ValueError("edges can only have 2 dimensions.")
     if not (edges.shape[1] == 2):
         raise ValueError("edges must be of shape (num_edges, 2).")
+    if not (input.dtype == torch.float32):
+        raise ValueError("input has to be of type torch.float32.")
+    if not (edges.dtype == torch.int64):
+        raise ValueError("edges has to be of type torch.int64.")
 
     num_vertices, input_feature_dim = input.shape
     num_edges = edges.shape[0]
@@ -152,6 +156,8 @@ class GatherScatter(Function):
             raise ValueError("edges must be of shape (num_edges, 2).")
         if not (input.dtype == torch.float32):
             raise ValueError("input has to be of type torch.float32.")
+        if not (edges.dtype == torch.int64):
+            raise ValueError("edges has to be of type torch.int64.")
 
         ctx.directed = directed
         input, edges = input.contiguous(), edges.contiguous()