diff --git a/INSTALL.md b/INSTALL.md
index 645d35e99..7c732ed6e 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -222,6 +222,7 @@ steps as above but when we call `cmake`, we have some differences:
       -DSKIA_DIR=$HOME/deps/skia \
       -DSKIA_LIBRARY_DIR=$HOME/deps/skia/out/Release-arm64 \
       -DSKIA_LIBRARY=$HOME/deps/skia/out/Release-arm64/libskia.a \
+      -DWEBP_LIBRARIES=$HOME/deps/skia/out/Release-arm64/libwebp.a \
       -DPNG_ARM_NEON:STRING=on \
       -G Ninja \
       ..
@@ -252,6 +253,7 @@ you must use libstdc++ to compile Aseprite:
       -DSKIA_DIR=$HOME/deps/skia \
       -DSKIA_LIBRARY_DIR=$HOME/deps/skia/out/Release-x64 \
       -DSKIA_LIBRARY=$HOME/deps/skia/out/Release-x64/libskia.a \
+      -DWEBP_LIBRARIES=$HOME/deps/skia/out/Release-x64/libwebp.a \
       -G Ninja \
       ..
     ninja aseprite