diff --git a/crates/ra_ide/src/completion/presentation.rs b/crates/ra_ide/src/completion/presentation.rs
index 25aff329edf..3dc56e4a3d8 100644
--- a/crates/ra_ide/src/completion/presentation.rs
+++ b/crates/ra_ide/src/completion/presentation.rs
@@ -104,10 +104,7 @@ impl Completions {
         };
 
         // Add `<>` for generic types
-        if ctx.is_path_type
-            && !ctx.has_type_args
-            && ctx.db.feature_flags.get("completion.insertion.add-call-parenthesis")
-        {
+        if ctx.is_path_type && !ctx.has_type_args && ctx.options.add_call_parenthesis {
             let has_non_default_type_params = match resolution {
                 ScopeDef::ModuleDef(Adt(it)) => it.has_non_default_type_params(ctx.db),
                 ScopeDef::ModuleDef(TypeAlias(it)) => it.has_non_default_type_params(ctx.db),
diff --git a/crates/ra_ide/src/lib.rs b/crates/ra_ide/src/lib.rs
index 0d91ea74978..d888bb7454c 100644
--- a/crates/ra_ide/src/lib.rs
+++ b/crates/ra_ide/src/lib.rs
@@ -450,17 +450,12 @@ impl Analysis {
     }
 
     /// Computes completions at the given position.
-    pub fn completions(&self, position: FilePosition) -> Cancelable<Option<Vec<CompletionItem>>> {
-        let opts = CompletionOptions {
-            enable_postfix_completions: self.feature_flags().get("completion.enable-postfix"),
-            add_call_parenthesis: self
-                .feature_flags()
-                .get("completion.insertion.add-call-parenthesis"),
-            add_call_argument_snippets: self
-                .feature_flags()
-                .get("completion.insertion.add-argument-snippets"),
-        };
-        self.with_db(|db| completion::completions(db, position, &opts).map(Into::into))
+    pub fn completions(
+        &self,
+        position: FilePosition,
+        options: &CompletionOptions,
+    ) -> Cancelable<Option<Vec<CompletionItem>>> {
+        self.with_db(|db| completion::completions(db, position, options).map(Into::into))
     }
 
     /// Computes assists (aka code actions aka intentions) for the given
diff --git a/crates/ra_ide_db/src/feature_flags.rs b/crates/ra_ide_db/src/feature_flags.rs
index 9684150727d..dbb3f50a095 100644
--- a/crates/ra_ide_db/src/feature_flags.rs
+++ b/crates/ra_ide_db/src/feature_flags.rs
@@ -2,6 +2,10 @@
 
 use rustc_hash::FxHashMap;
 
+// FIXME: looks like a much better design is to pass options to each call,
+// rather than to have a global ambient feature flags -- that way, the clients
+// can issue two successive calls with different options.
+
 /// Feature flags hold fine-grained toggles for all *user-visible* features of
 /// rust-analyzer.
 ///
diff --git a/crates/rust-analyzer/src/cli/analysis_bench.rs b/crates/rust-analyzer/src/cli/analysis_bench.rs
index 91855e59252..28a23934f15 100644
--- a/crates/rust-analyzer/src/cli/analysis_bench.rs
+++ b/crates/rust-analyzer/src/cli/analysis_bench.rs
@@ -12,7 +12,7 @@ use ra_db::{
     salsa::{Database, Durability},
     FileId, SourceDatabaseExt,
 };
-use ra_ide::{Analysis, AnalysisChange, AnalysisHost, FilePosition, LineCol};
+use ra_ide::{Analysis, AnalysisChange, AnalysisHost, CompletionOptions, FilePosition, LineCol};
 
 use crate::cli::{load_cargo::load_cargo, Verbosity};
 
@@ -94,17 +94,19 @@ pub fn analysis_bench(verbosity: Verbosity, path: &Path, what: BenchWhat) -> Res
                 .analysis()
                 .file_line_index(file_id)?
                 .offset(LineCol { line: pos.line - 1, col_utf16: pos.column });
-            let file_postion = FilePosition { file_id, offset };
+            let file_position = FilePosition { file_id, offset };
 
             if is_completion {
-                let res =
-                    do_work(&mut host, file_id, |analysis| analysis.completions(file_postion));
+                let options = CompletionOptions::default();
+                let res = do_work(&mut host, file_id, |analysis| {
+                    analysis.completions(file_position, &options)
+                });
                 if verbosity.is_verbose() {
                     println!("\n{:#?}", res);
                 }
             } else {
                 let res =
-                    do_work(&mut host, file_id, |analysis| analysis.goto_definition(file_postion));
+                    do_work(&mut host, file_id, |analysis| analysis.goto_definition(file_position));
                 if verbosity.is_verbose() {
                     println!("\n{:#?}", res);
                 }
diff --git a/crates/rust-analyzer/src/main_loop/handlers.rs b/crates/rust-analyzer/src/main_loop/handlers.rs
index 8dc6e8dc05d..155f677a6dc 100644
--- a/crates/rust-analyzer/src/main_loop/handlers.rs
+++ b/crates/rust-analyzer/src/main_loop/handlers.rs
@@ -20,8 +20,8 @@ use lsp_types::{
     TextEdit, WorkspaceEdit,
 };
 use ra_ide::{
-    Assist, AssistId, FileId, FilePosition, FileRange, Query, RangeInfo, Runnable, RunnableKind,
-    SearchScope,
+    Assist, AssistId, CompletionOptions, FileId, FilePosition, FileRange, Query, RangeInfo,
+    Runnable, RunnableKind, SearchScope,
 };
 use ra_prof::profile;
 use ra_syntax::{AstNode, SyntaxKind, TextRange, TextUnit};
@@ -424,7 +424,17 @@ pub fn handle_completion(
         return Ok(None);
     }
 
-    let items = match world.analysis().completions(position)? {
+    let options = CompletionOptions {
+        enable_postfix_completions: world.feature_flags().get("completion.enable-postfix"),
+        add_call_parenthesis: world
+            .feature_flags()
+            .get("completion.insertion.add-call-parenthesis"),
+        add_call_argument_snippets: world
+            .feature_flags()
+            .get("completion.insertion.add-argument-snippets"),
+    };
+
+    let items = match world.analysis().completions(position, &options)? {
         None => return Ok(None),
         Some(items) => items,
     };