diff --git a/imageio/jpegdec.c b/imageio/jpegdec.c
index d87510f5..7bce1206 100644
--- a/imageio/jpegdec.c
+++ b/imageio/jpegdec.c
@@ -205,12 +205,12 @@ struct my_error_mgr {
 };
 
 static void my_error_exit(j_common_ptr dinfo) {
+  struct my_error_mgr* myerr = (struct my_error_mgr*)dinfo->err;
   // The following code is disabled in fuzzing mode because:
   // - the logs can be flooded due to invalid JPEG files
   // - msg_code is wrongfully seen as uninitialized by msan when the libjpeg
   //   dependency is not built with sanitizers enabled
 #ifndef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
-  struct my_error_mgr* myerr = (struct my_error_mgr*)dinfo->err;
   const int msg_code = myerr->pub.msg_code;
   fprintf(stderr, "libjpeg error: ");
   dinfo->err->output_message(dinfo);