diff --git a/CMakeLists.txt b/CMakeLists.txt
index d7f70bed..e8de17e2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -301,13 +301,6 @@ else()
         ${PROTO_HDRS}
         )
 
-    add_executable(ripples-fast
-        src/mutation_annotated_tree.cpp
-        src/usher_mapper.cpp
-        ${RIPPLES_FAST_SRCS}
-        ${PROTO_SRCS}
-        ${PROTO_HDRS}
-        )
     add_executable(usher-sampled
         ${USHER_SAMPLED_SRCS}
         ${PROTO_SRCS}