diff --git a/easybuild/easyconfigs/o/OpenFOAM/OpenFOAM-v2112-foss-2021b.eb b/easybuild/easyconfigs/o/OpenFOAM/OpenFOAM-v2112-foss-2021b.eb
index 324e545e4b5b..3f2bdc728021 100644
--- a/easybuild/easyconfigs/o/OpenFOAM/OpenFOAM-v2112-foss-2021b.eb
+++ b/easybuild/easyconfigs/o/OpenFOAM/OpenFOAM-v2112-foss-2021b.eb
@@ -8,7 +8,10 @@ description = """OpenFOAM is a free, open source CFD software package.
  to solid dynamics and electromagnetics."""
 
 toolchain = {'name': 'foss', 'version': '2021b'}
-toolchainopts = {'cstd': 'c++11'}
+# Users have found that vectorizion caused OpenFOAM to produce some very incorrect results.
+# Disabling vectorize was confirmed to fix the the known issues.
+# With no test suite, sticking to known working toolchain options until proven otherwise.
+toolchainopts = {'cstd': 'c++11', 'vectorize': False}
 
 source_urls = ['https://sourceforge.net/projects/openfoam/files/%(version)s/']
 sources = [SOURCE_TGZ]