diff --git a/src/gallium/state_trackers/va/picture.c b/src/gallium/state_trackers/va/picture.c
index 20fe750..bf91456 100644
--- a/src/gallium/state_trackers/va/picture.c
+++ b/src/gallium/state_trackers/va/picture.c
@@ -371,7 +371,7 @@ handleVAEncSequenceParameterBufferType(vlVaDriver *drv, vlVaContext *context, vl
          return VA_STATUS_ERROR_ALLOCATION_FAILED;
    }
 
-   context->gop_coeff = ((1024 + h264->intra_idr_period - 1) / h264->intra_idr_period + 1) / 2 * 2;
+   context->gop_coeff = ((1024 + h264->intra_idr_period - 1) / (h264->intra_idr_period + 1)) / 2 * 2;
    if (context->gop_coeff > VL_VA_ENC_GOP_COEFF)
       context->gop_coeff = VL_VA_ENC_GOP_COEFF;
    context->desc.h264enc.gop_size = h264->intra_idr_period * context->gop_coeff;