--- ../OpenFOAM-v1906/src/OpenFOAM/primitives/ints/int64/int64.H	2019-06-26 16:16:55.000000000 +0200
+++ ./src/OpenFOAM/primitives/ints/int64/int64.H	2019-09-06 13:24:17.447401991 +0200
@@ -194,7 +194,7 @@
 
 inline int64_t mag(const int64_t val)
 {
-    return ::labs(val);
+    return ::abs(val);
 }