diff --git a/src/gallium/drivers/i915simple/i915_debug_fp.c b/src/gallium/drivers/i915simple/i915_debug_fp.c
index 37a3508fe14..c024a051a58 100644
--- a/src/gallium/drivers/i915simple/i915_debug_fp.c
+++ b/src/gallium/drivers/i915simple/i915_debug_fp.c
@@ -333,12 +333,11 @@ void
 i915_disassemble_program(struct debug_stream *stream, 
 			 const unsigned * program, unsigned sz)
 {
-   unsigned size = program[0] & 0x1ff;
    unsigned i;
 
    PRINTF(stream, "\t\tBEGIN\n");
 
-   assert(size + 2 == sz);
+   assert((program[0] & 0x1ff) + 2 == sz);
 
    program++;
    for (i = 1; i < sz; i += 3, program += 3) {