diff --git a/src/build.cc b/src/build.cc
index eed52aef65..0fc387c483 100644
--- a/src/build.cc
+++ b/src/build.cc
@@ -465,7 +465,7 @@ void RealCommandRunner::Abort() {
 
 bool RealCommandRunner::CanRunMore() {
   return ((int)subprocs_.running_.size()) < config_.parallelism
-    && ((subprocs_.running_.size() == 0 || config_.max_load_average <= 0.0f)
+    && ((subprocs_.running_.empty() || config_.max_load_average <= 0.0f)
         || GetLoadAverage() < config_.max_load_average);
 }