diff --git a/INSTALL.md b/INSTALL.md
index 62ab8fa4c9..b8c7e1ee6e 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -167,6 +167,22 @@ The `-j` option enables parallel compilation of multiple units, leading to a
 faster build, but increasing the chances of running out of memory, in which case
 it is recommended to set the `-j` option to a fixed value (such as `-j4`).
 
+If making use of optimization options, build the correct target before swigfaiss.
+
+For AVX2:
+
+``` shell
+$ make -C build -j faiss_avx2
+```
+
+For AVX512:
+
+``` shell
+$ make -C build -j faiss_avx512
+```
+
+This will ensure the creation of neccesary files when building and installing the python package.
+
 ## Step 3: Building the python bindings (optional)
 
 ``` shell
@@ -177,6 +193,7 @@ $ (cd build/faiss/python && python setup.py install)
 The first command builds the python bindings for Faiss, while the second one
 generates and installs the python package.
 
+
 ## Step 4: Installing the C++ library and headers (optional)
 
 ``` shell