diff --git a/src/extras/screendroplets.cpp b/src/extras/screendroplets.cpp
index 2485386b..cc86808f 100644
--- a/src/extras/screendroplets.cpp
+++ b/src/extras/screendroplets.cpp
@@ -741,7 +741,7 @@ uint32 im2D_UV2_Vao;
 void
 openim2d_uv2(void)
 {
-	u_xform = rw::gl3::registerUniform("u_xform");	// this doesn't add a new one, so it's safe
+	u_xform = rw::gl3::registerUniform("u_xform", rw::gl3::UNIFORM_VEC4);	// this doesn't add a new one, so it's safe
 
 	glGenBuffers(1, &im2D_UV2_Ibo);
 	glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, im2D_UV2_Ibo);
@@ -803,7 +803,7 @@ RenderIndexedPrimitive_UV2(RwPrimitiveType primType, Im2DVertexUV2 *vertices, Rw
 	setAttribPointers(im2d_UV2_attribDesc, 4);
 #endif
 
-	glUniform4fv(currentShader->uniformLocations[u_xform], 1, xform);
+	setUniform(u_xform, xform);
 
 	flushCache();
 	glDrawElements(primTypeMap[primType], numIndices,
diff --git a/vendor/librw b/vendor/librw
index a5bc9723..4c4b1990 160000
--- a/vendor/librw
+++ b/vendor/librw
@@ -1 +1 @@
-Subproject commit a5bc97232293250ae1bbd6ef6642532a541034ca
+Subproject commit 4c4b199057e9570557cdf108d21795236a076755