diff --git a/sonic-slave-bullseye/Dockerfile.j2 b/sonic-slave-bullseye/Dockerfile.j2
index a75cef0b680..471412761f1 100644
--- a/sonic-slave-bullseye/Dockerfile.j2
+++ b/sonic-slave-bullseye/Dockerfile.j2
@@ -339,6 +339,7 @@ RUN apt-get update && apt-get install -y \
         libboost-regex-dev \
         googletest \
         libgtest-dev \
+        libgmock-dev \
         libgcc-10-dev \
 # For sonic-host-services build
         libcairo2-dev \
diff --git a/sonic-slave-buster/Dockerfile.j2 b/sonic-slave-buster/Dockerfile.j2
index fa8ac44f1b9..269501fb2e4 100644
--- a/sonic-slave-buster/Dockerfile.j2
+++ b/sonic-slave-buster/Dockerfile.j2
@@ -353,6 +353,7 @@ RUN apt-get update && apt-get install -y \
         libboost-regex1.71-dev \
         googletest \
         libgtest-dev \
+        libgmock-dev \
         libgcc-8-dev \
 # For sonic-host-services build
         libcairo2-dev \