diff --git a/rsAllocation.cpp b/rsAllocation.cpp
index 6b37e03..a759004 100644
--- a/rsAllocation.cpp
+++ b/rsAllocation.cpp
@@ -780,7 +780,7 @@
     a->data(rsc, xoff, yoff, lod, face, w, h, data, sizeBytes);
 }
 
-void rsi_AllocationRead(Context *rsc, RsAllocation va, void *data) {
+void rsi_AllocationRead(Context *rsc, RsAllocation va, void *data, size_t data_length) {
     Allocation *a = static_cast<Allocation *>(va);
     a->read(data);
 }