diff --git a/.ci/lib/config.jenkinsfile b/.ci/lib/config.jenkinsfile
index 75e4ff6123..2b900aff15 100644
--- a/.ci/lib/config.jenkinsfile
+++ b/.ci/lib/config.jenkinsfile
@@ -1,4 +1,3 @@
-env.WERROR = '1'
 env.MAKEOPTS = '-j8'
 
 python_platlib = sh(returnStdout: true, script: 'python3 Scripts/get-python-platlib.py "$PREFIX"')
diff --git a/.ci/lib/stage-build-nosgx.jenkinsfile b/.ci/lib/stage-build-nosgx.jenkinsfile
index 990f022fbb..a6f99f6855 100644
--- a/.ci/lib/stage-build-nosgx.jenkinsfile
+++ b/.ci/lib/stage-build-nosgx.jenkinsfile
@@ -13,6 +13,7 @@ stage('build') {
     try {
         sh '''
             meson setup build/ \
+                --werror \
                 --prefix="$PREFIX" \
                 --buildtype="$BUILDTYPE" \
                 -Dskeleton=enabled \
diff --git a/.ci/lib/stage-build-sgx.jenkinsfile b/.ci/lib/stage-build-sgx.jenkinsfile
index f0312dd72f..30cb446770 100644
--- a/.ci/lib/stage-build-sgx.jenkinsfile
+++ b/.ci/lib/stage-build-sgx.jenkinsfile
@@ -32,6 +32,7 @@ stage('build') {
     try {
         sh '''
             meson setup build-dcap/ \
+                --werror \
                 --prefix="$PREFIX" \
                 --buildtype="$BUILDTYPE" \
                 -Ddirect=disabled \
@@ -49,6 +50,7 @@ stage('build') {
     try {
         sh '''
             meson setup build/ \
+                --werror \
                 --prefix="$PREFIX" \
                 --buildtype="$BUILDTYPE" \
                 -Ddirect=disabled \
diff --git a/CONTRIBUTING.rst b/CONTRIBUTING.rst
index b099314ae7..fb0f8e9b65 100644
--- a/CONTRIBUTING.rst
+++ b/CONTRIBUTING.rst
@@ -182,7 +182,7 @@ also built by Meson, must be installed as well. To do that, configure your build
 directory with ``-Dtests=enabled`` and install Gramine::
 
    # add -Dsgx=enabled and SGX options if necessary
-   meson setup build/ -Dtests=enabled -Ddirect=enabled
+   meson setup build/ --werror -Dtests=enabled -Ddirect=enabled
 
    ninja -C build/
    sudo ninja -C build/ install
diff --git a/Documentation/devel/building.rst b/Documentation/devel/building.rst
index ff868aaee6..c188d06c18 100644
--- a/Documentation/devel/building.rst
+++ b/Documentation/devel/building.rst
@@ -156,6 +156,11 @@ means non-SGX version)::
    meson setup build/ --buildtype=release -Ddirect=enabled -Dsgx=enabled \
        -Dsgx_driver=<driver> -Dsgx_driver_include_path=<path-to-sgx-driver-sources>
 
+.. note::
+
+   If you plan to contribute changes to Gramine, then you should always build it
+   with ``--werror`` added to the invocation above.
+
 .. note::
 
    If you invoked ``meson setup`` once, the next invocation of this command will
diff --git a/Documentation/devel/debugging.rst b/Documentation/devel/debugging.rst
index 33de8a09fd..f05f55b8dd 100644
--- a/Documentation/devel/debugging.rst
+++ b/Documentation/devel/debugging.rst
@@ -14,7 +14,7 @@ debugging process easier.
 To build Gramine with debug symbols, the source code needs to be compiled with
 ``--buildtype=debug``::
 
-    meson setup build-debug/ --buildtype=debug -Ddirect=enabled
+    meson setup build-debug/ --werror --buildtype=debug -Ddirect=enabled
     ninja -C build-debug/
     sudo ninja -C build-debug/ install
 
@@ -37,7 +37,7 @@ execution *outside* the enclave).
 To build Gramine with debug symbols, the source code needs to be compiled with
 ``--buildtype=debug``::
 
-    meson setup build-debug/ --buildtype=debug -Dsgx=enabled
+    meson setup build-debug/ --werror --buildtype=debug -Dsgx=enabled
     ninja -C build-debug/
     sudo ninja -C build-debug/ install
 
diff --git a/meson.build b/meson.build
index 7334f2aea1..050a0a9d95 100644
--- a/meson.build
+++ b/meson.build
@@ -13,7 +13,6 @@ project(
     default_options: [
         'c_std=c11',
         'cpp_std=c++14',
-        'werror=true',
     ],
 )