diff --git a/wmake/wmakePrintBuild b/wmake/wmakePrintBuild
index 01351975a0..4e727a7438 100755
--- a/wmake/wmakePrintBuild
+++ b/wmake/wmakePrintBuild
@@ -147,7 +147,7 @@ then
     # Any of OPENFOAM=<digits>, OPENFOAM_API=<digits>, OPENFOAM_COM=<digits>
     # OPENFOAM_PLUS=<digits>
     version=$(
-        sed -ne 's@^.*OPENFOAM\(_API|_COM|_PLUS\)*=\([0-9][0-9]*\).*@\2@p' \
+        sed -ne 's@^.*OPENFOAM\(_API\|_COM\|_PLUS\)*=\([0-9][0-9]*\).*@\2@p' \
         $WM_DIR/rules/General/general 2>/dev/null
     )