diff --git a/travis/compile_nwchem.sh b/travis/compile_nwchem.sh
index 4b928d6c2f..88abc6d6b4 100755
--- a/travis/compile_nwchem.sh
+++ b/travis/compile_nwchem.sh
@@ -98,6 +98,9 @@ fi
    if [[ ! -z "$USE_SIMINT" ]] ; then 
 #       FOPT="-O0 -fno-aggressive-loop-optimizations"
        SIMINT_BUILD_TYPE=Debug
+       if [[ "$arch" != "x86_64" ]]; then
+	   SIMINT_VEC=scalar
+       fi
        export PATH="/usr/local/bin:$PATH"
 #       export LDFLAGS="-L/usr/local/opt/python@3.7/lib:$LDFLAGS"
    fi