diff --git a/clang-tools-extra/clangd/index/Index.cpp b/clang-tools-extra/clangd/index/Index.cpp
index 52eb42799af7b..7cbc92057ddf0 100644
--- a/clang-tools-extra/clangd/index/Index.cpp
+++ b/clang-tools-extra/clangd/index/Index.cpp
@@ -59,7 +59,7 @@ raw_ostream &operator<<(raw_ostream &OS, const Symbol &S) {
   return OS << S.Scope << S.Name;
 }
 
-double quality(const Symbol &S) {
+float quality(const Symbol &S) {
   // This avoids a sharp gradient for tail symbols, and also neatly avoids the
   // question of whether 0 references means a bad symbol or missing data.
   if (S.References < 3)
diff --git a/clang-tools-extra/clangd/index/Index.h b/clang-tools-extra/clangd/index/Index.h
index c1778e18932a3..bd21ead187887 100644
--- a/clang-tools-extra/clangd/index/Index.h
+++ b/clang-tools-extra/clangd/index/Index.h
@@ -250,7 +250,7 @@ llvm::raw_ostream &operator<<(llvm::raw_ostream &OS, const Symbol &S);
 // This currently falls in the range [1, ln(#indexed documents)].
 // FIXME: this should probably be split into symbol -> signals
 //        and signals -> score, so it can be reused for Sema completions.
-double quality(const Symbol &S);
+float quality(const Symbol &S);
 
 // An immutable symbol container that stores a set of symbols.
 // The container will maintain the lifetime of the symbols.