diff --git a/doc/developer/cross-compiling.rst b/doc/developer/cross-compiling.rst
index af99262c4f..c503487441 100644
--- a/doc/developer/cross-compiling.rst
+++ b/doc/developer/cross-compiling.rst
@@ -148,7 +148,7 @@ be built and installed generally like:
    CC=${HOST_ARCH}-gcc \
    CXX=${HOST_ARCH}-g++ \
    cmake \
-       -DCMAKE_INSTALL_PREFIX=/usr/${HOST_ARCH} \
+       --install-prefix /usr/${HOST_ARCH} \
        ..
    make
    make install