diff --git a/tensorflow/tools/ci_build/linux/mkl/Dockerfile.devel-mkl b/tensorflow/tools/ci_build/linux/mkl/Dockerfile.devel-mkl
index 1f80cba35f0..80091e55a17 100755
--- a/tensorflow/tools/ci_build/linux/mkl/Dockerfile.devel-mkl
+++ b/tensorflow/tools/ci_build/linux/mkl/Dockerfile.devel-mkl
@@ -64,7 +64,7 @@ RUN bazel --bazelrc=/root/.bazelrc build -c opt \
 
 # Install OpenMPI/Horovod
 COPY install_openmpi_horovod.sh .
-RUN if [ "${ENABLE_HOROVOD}" == "yes" ]; then \
+RUN if [ "${ENABLE_HOROVOD}" = "yes" ]; then \
         chmod +x install_openmpi_horovod.sh && \
         OPENMPI_VERSION=${OPENMPI_VERSION} OPENMPI_DOWNLOAD_URL=${OPENMPI_DOWNLOAD_URL} HOROVOD_VERSION=${HOROVOD_VERSION} ./install_openmpi_horovod.sh && \
         rm -rf install_openmpi_horovod.sh; \