diff --git a/src/muParserBase.cpp b/src/muParserBase.cpp
index 5ffbb49..1ee8875 100644
--- a/src/muParserBase.cpp
+++ b/src/muParserBase.cpp
@@ -1903,7 +1903,8 @@ namespace mu
 #endif
 		omp_set_num_threads(nMaxThreads);
 
-#pragma omp parallel for schedule(static, std::max(nBulkSize/nMaxThreads, 1)) private(nThreadID)
+		const int chunkSize = std::max(nBulkSize/nMaxThreads, 1);
+#pragma omp parallel for schedule(static, chunkSize) private(nThreadID)
 		for (i = 0; i < nBulkSize; ++i)
 		{
 			nThreadID = omp_get_thread_num();