diff --git a/setup.py b/setup.py
index abdd87ea2..0abfaaddc 100644
--- a/setup.py
+++ b/setup.py
@@ -37,7 +37,9 @@ IMAGEQUANT_ROOT = None
 JPEG2K_ROOT = None
 JPEG_ROOT = None
 LCMS_ROOT = None
+RAQM_ROOT = None
 TIFF_ROOT = None
+WEBP_ROOT = None
 ZLIB_ROOT = None
 FUZZING_BUILD = "LIB_FUZZING_ENGINE" in os.environ
 
@@ -459,6 +461,8 @@ class pil_build_ext(build_ext):
             "FREETYPE_ROOT": "freetype2",
             "HARFBUZZ_ROOT": "harfbuzz",
             "FRIBIDI_ROOT": "fribidi",
+            "RAQM_ROOT": "raqm",
+            "WEBP_ROOT": "libwebp",
             "LCMS_ROOT": "lcms2",
             "IMAGEQUANT_ROOT": "libimagequant",
         }.items():