diff --git a/docker/1.5/Dockerfile b/docker/1.5/Dockerfile
index 0d71797f..83dee964 100644
--- a/docker/1.5/Dockerfile
+++ b/docker/1.5/Dockerfile
@@ -59,7 +59,6 @@ RUN set -x && \
         LDFLAGS="-L/build/lws/lib -flto" \
         WITH_ADNS=no \
         WITH_DOCS=no \
-        WITH_MEMORY_TRACKING=no \
         WITH_SHARED_LIBRARIES=no \
         WITH_SRV=no \
         WITH_STRIP=yes \
diff --git a/docker/1.6/Dockerfile b/docker/1.6/Dockerfile
index e88e7c74..39baa657 100644
--- a/docker/1.6/Dockerfile
+++ b/docker/1.6/Dockerfile
@@ -59,7 +59,6 @@ RUN set -x && \
         LDFLAGS="-L/build/lws/lib" \
         WITH_ADNS=no \
         WITH_DOCS=no \
-        WITH_MEMORY_TRACKING=yes \
         WITH_SHARED_LIBRARIES=yes \
         WITH_SRV=no \
         WITH_STRIP=yes \
diff --git a/docker/local/Dockerfile b/docker/local/Dockerfile
index f0360e46..06527a69 100644
--- a/docker/local/Dockerfile
+++ b/docker/local/Dockerfile
@@ -40,7 +40,6 @@ RUN set -x && \
         LDFLAGS="-L/build/lws/lib" \
         WITH_ADNS=no \
         WITH_DOCS=no \
-        WITH_MEMORY_TRACKING=yes \
         WITH_SHARED_LIBRARIES=yes \
         WITH_SRV=no \
         WITH_STRIP=yes \