diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7f2717f426..d2bfd2f6f8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -480,6 +480,7 @@ if(CURL_DISABLE_HTTP)
   set(CURL_DISABLE_RTSP ON)
   set(CURL_DISABLE_ALTSVC ON)
   set(CURL_DISABLE_HSTS ON)
+  set(CURL_DISABLE_WEBSOCKETS ON)
 endif()
 
 # Corresponds to HTTP_ONLY in lib/curl_setup.h