diff --git a/voxel_buffer.cpp b/voxel_buffer.cpp
index 696727f9..adc55e9c 100644
--- a/voxel_buffer.cpp
+++ b/voxel_buffer.cpp
@@ -304,7 +304,7 @@ void VoxelBuffer::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("copy_from", "other", "channel"), &VoxelBuffer::_copy_from_binding, DEFVAL(0));
 	ClassDB::bind_method(D_METHOD("copy_from_area", "other", "src_min", "src_max", "dst_min", "channel"), &VoxelBuffer::_copy_from_area_binding, DEFVAL(0));
 
-	ClassDB::bind_method(D_METHOD("is_uniform", "channel"), &VoxelBuffer::is_uniform, DEFVAL(0));
+	ClassDB::bind_method(D_METHOD("is_uniform", "channel"), &VoxelBuffer::is_uniform);
 	ClassDB::bind_method(D_METHOD("optimize"), &VoxelBuffer::optimize);
 
 	BIND_ENUM_CONSTANT(CHANNEL_TYPE);
diff --git a/voxel_buffer.h b/voxel_buffer.h
index 6af94dc2..e95066da 100644
--- a/voxel_buffer.h
+++ b/voxel_buffer.h
@@ -76,7 +76,7 @@ public:
 	_FORCE_INLINE_ void fill_iso(float value, unsigned int channel = 0) { fill(iso_to_byte(value), channel); }
 	void fill_area(int defval, Vector3i min, Vector3i max, unsigned int channel_index = 0);
 
-	bool is_uniform(unsigned int channel_index = 0) const;
+	bool is_uniform(unsigned int channel_index) const;
 
 	void optimize();