diff --git a/Tusker/Screens/Compose/ComposeAutocompleteView.swift b/Tusker/Screens/Compose/ComposeAutocompleteView.swift
index 7cf05b00..000be703 100644
--- a/Tusker/Screens/Compose/ComposeAutocompleteView.swift
+++ b/Tusker/Screens/Compose/ComposeAutocompleteView.swift
@@ -73,7 +73,7 @@ struct ComposeAutocompleteMentionsView: View {
             HStack(spacing: 8) {
                 ForEach(accounts, id: \.id) { (account) in
                     Button {
-                        uiState.autocompleteHandler?.autocomplete(with: "@\(account.acct) ")
+                        uiState.autocompleteHandler?.autocomplete(with: "@\(account.acct)")
                     } label: {
                         HStack(spacing: 4) {
                             ComposeAvatarImageView(url: account.avatar)
@@ -210,7 +210,7 @@ struct ComposeAutocompleteEmojisView: View {
             HStack(spacing: 8) {
                 ForEach(emojis, id: \.shortcode) { (emoji) in
                     Button {
-                        uiState.autocompleteHandler?.autocomplete(with: ":\(emoji.shortcode): ")
+                        uiState.autocompleteHandler?.autocomplete(with: ":\(emoji.shortcode):")
                     } label: {
                         HStack(spacing: 4) {
                             CustomEmojiImageView(emoji: emoji)
@@ -266,7 +266,7 @@ struct ComposeAutocompleteHashtagsView: View {
             HStack(spacing: 8) {
                 ForEach(hashtags, id: \.name) { (hashtag) in
                     Button {
-                        uiState.autocompleteHandler?.autocomplete(with: "#\(hashtag.name) ")
+                        uiState.autocompleteHandler?.autocomplete(with: "#\(hashtag.name)")
                     } label: {
                         Text(verbatim: "#\(hashtag.name)")
                             .foregroundColor(Color(UIColor.label))
diff --git a/Tusker/Screens/Compose/ComposeContentWarningTextField.swift b/Tusker/Screens/Compose/ComposeContentWarningTextField.swift
index 72cf26aa..05ddb15f 100644
--- a/Tusker/Screens/Compose/ComposeContentWarningTextField.swift
+++ b/Tusker/Screens/Compose/ComposeContentWarningTextField.swift
@@ -75,6 +75,15 @@ struct ComposeContentWarningTextField: UIViewRepresentable {
             let selectedRangeStartUTF16 = textField.offset(from: textField.beginningOfDocument, to: selectedRange.start)
             let characterBeforeCursorIndex = text.utf16.index(text.startIndex, offsetBy: selectedRangeStartUTF16)
             
+            let insertSpace: Bool
+            if text.distance(from: characterBeforeCursorIndex, to: text.endIndex) > 0 {
+                let charAfterCursor = text[text.index(after: characterBeforeCursorIndex)]
+                insertSpace = charAfterCursor != " " && charAfterCursor != "\n"
+            } else {
+                insertSpace = true
+            }
+            let string = insertSpace ? string + " " : string
+            
             textField.text!.replaceSubrange(lastWordStartIndex..<characterBeforeCursorIndex, with: string)
             didChange(textField)
             
diff --git a/Tusker/Screens/Compose/MainComposeTextView.swift b/Tusker/Screens/Compose/MainComposeTextView.swift
index a499680d..d97dbf61 100644
--- a/Tusker/Screens/Compose/MainComposeTextView.swift
+++ b/Tusker/Screens/Compose/MainComposeTextView.swift
@@ -243,6 +243,15 @@ struct MainComposeWrappedTextView: UIViewRepresentable {
             
             let characterBeforeCursorIndex = text.utf16.index(text.startIndex, offsetBy: textView.selectedRange.upperBound)
             
+            let insertSpace: Bool
+            if text.distance(from: characterBeforeCursorIndex, to: text.endIndex) > 0 {
+                let charAfterCursor = text[text.index(after: characterBeforeCursorIndex)]
+                insertSpace = charAfterCursor != " " && charAfterCursor != "\n"
+            } else {
+                insertSpace = true
+            }
+            let string = insertSpace ? string + " " : string
+            
             textView.text.replaceSubrange(lastWordStartIndex..<characterBeforeCursorIndex, with: string)
             self.textViewDidChange(textView)