diff --git a/libs/rs/java/Samples/src/com/android/samples/rsrenderstates.rs b/libs/rs/java/Samples/src/com/android/samples/rsrenderstates.rs
index 91613cf..4bcf7f5 100644
--- a/libs/rs/java/Samples/src/com/android/samples/rsrenderstates.rs
+++ b/libs/rs/java/Samples/src/com/android/samples/rsrenderstates.rs
@@ -369,6 +369,7 @@
     gVSConstants->light1_Diffuse = 1.0f;
     gVSConstants->light1_Specular = 0.7f;
     gVSConstants->light1_CosinePower = 50.0f;
+    rsAllocationMarkDirty(rsGetAllocation(gVSConstants));
 
     // Update fragmetn shader constants
     // Set light 0 colors
@@ -377,6 +378,7 @@
     // Set light 1 colors
     gFSConstants->light1_DiffuseColor = light1DiffCol;
     gFSConstants->light1_SpecularColor = light1SpecCol;
+    rsAllocationMarkDirty(rsGetAllocation(gFSConstants));
 }
 
 void displayCustomShaderSamples() {
diff --git a/libs/rs/rsAllocation.h b/libs/rs/rsAllocation.h
index 967f220..b6b5d2f 100644
--- a/libs/rs/rsAllocation.h
+++ b/libs/rs/rsAllocation.h
@@ -89,9 +89,9 @@
     void incRefs(const void *ptr, size_t ct) const;
     void decRefs(const void *ptr, size_t ct) const;
 
-protected:
     void sendDirty() const;
 
+protected:
     ObjectBaseRef<const Type> mType;
     void * mPtr;
 
diff --git a/libs/rs/rsScriptC_Lib.cpp b/libs/rs/rsScriptC_Lib.cpp
index b4b32bb..41828dc 100644
--- a/libs/rs/rsScriptC_Lib.cpp
+++ b/libs/rs/rsScriptC_Lib.cpp
@@ -356,6 +356,11 @@
     return (int)alloc;
 }
 
+void SC_allocationMarkDirty(RsAllocation a)
+{
+    Allocation *alloc = static_cast<Allocation *>(a);
+    alloc->sendDirty();
+}
 
 void SC_ForEach(RsScript vs,
                 RsAllocation vin,
@@ -422,6 +427,8 @@
     { "_Z13rsClearObjectP13rs_allocation", (void *)&SC_clearObject },
     { "_Z10rsIsObject13rs_allocation", (void *)&SC_isObject },
 
+    { "_Z21rsAllocationMarkDirty13rs_allocation", (void *)&SC_allocationMarkDirty },
+
 
     // Debug
     { "_Z7rsDebugPKcf", (void *)&SC_debugF },
diff --git a/libs/rs/scriptc/rs_math.rsh b/libs/rs/scriptc/rs_math.rsh
index c842ef1..5720b05 100644
--- a/libs/rs/scriptc/rs_math.rsh
+++ b/libs/rs/scriptc/rs_math.rsh
@@ -107,6 +107,10 @@
 extern rs_allocation __attribute__((overloadable))
     rsGetAllocation(const void *);
 
+// Mark the allocation dirty and notify those using it
+extern void __attribute__((overloadable))
+    rsAllocationMarkDirty(rs_allocation);
+
 // Return the dimensions associated with an allocation.
 extern uint32_t __attribute__((overloadable))
     rsAllocationGetDimX(rs_allocation);