diff --git a/src/mesa/drivers/dri/i965/brw_context.c b/src/mesa/drivers/dri/i965/brw_context.c
index 33f1bba..1c7ad5c 100644
--- a/src/mesa/drivers/dri/i965/brw_context.c
+++ b/src/mesa/drivers/dri/i965/brw_context.c
@@ -125,7 +125,7 @@ GLboolean brwCreateContext( const __GLcontextModes *mesaVis,
    ctx->Const.MaxTextureUnits = BRW_MAX_TEX_UNIT;
    ctx->Const.MaxTextureImageUnits = BRW_MAX_TEX_UNIT;
    ctx->Const.MaxTextureCoordUnits = BRW_MAX_TEX_UNIT;
-
+   ctx->Const.MaxVertexTextureImageUnits = 0; /* no vertex shader textures */
 
    /* Advertise the full hardware capabilities.  The new memory
     * manager should cope much better with overload situations:
diff --git a/src/mesa/shader/slang/slang_link.c b/src/mesa/shader/slang/slang_link.c
index dd4990b..f9a5ece 100644
--- a/src/mesa/shader/slang/slang_link.c
+++ b/src/mesa/shader/slang/slang_link.c
@@ -474,6 +474,12 @@ _slang_link(GLcontext *ctx,
       }         
    }
 
+   /* Check that the vertex program doesn't use too many sampler units */
+   if (shProg->VertexProgram &&
+       _mesa_bitcount(shProg->VertexProgram->Base.SamplersUsed) > ctx->Const.MaxVertexTextureImageUnits) {
+      link_error(shProg, "Vertex program uses too many samplers.\n");
+      return;
+   }
 
    if (fragProg && shProg->FragmentProgram) {
       /* notify driver that a new fragment program has been compiled/linked */