diff --git a/src/mesa/drivers/dri/i915/intel_pixel.c b/src/mesa/drivers/dri/i915/intel_pixel.c
index 830aa4355c1..d842273a80d 100644
--- a/src/mesa/drivers/dri/i915/intel_pixel.c
+++ b/src/mesa/drivers/dri/i915/intel_pixel.c
@@ -145,7 +145,7 @@ intelTryReadPixels( GLcontext *ctx,
 		  GLvoid *pixels )
 {
    intelContextPtr intel = INTEL_CONTEXT(ctx);
-   GLint size;
+   GLint size = 0;
    GLint pitch = pack->RowLength ? pack->RowLength : width;
 
    if (INTEL_DEBUG & DEBUG_PIXEL)