diff --git a/src/tmux-manager.ts b/src/tmux-manager.ts
index 9e2fd296..6c2cde4d 100644
--- a/src/tmux-manager.ts
+++ b/src/tmux-manager.ts
@@ -3863,9 +3863,14 @@ export class TmuxManager extends EventEmitter implements TerminalMultiplexer {
 
     try {
       const hasCarriageReturn = input.includes('\r');
-      // Leading and trailing line breaks are dropped, so `"\nfix it\r"` does not paste
-      // an empty first line (nor `"fix it\n\r"` an empty last one).
-      const textPart = input.replace(/\r/g, '').replace(/^\n+/, '').trimEnd();
+      // Leading and trailing blank lines are dropped, so neither `"\nfix it\r"` nor
+      // `"  \nfix it\r"` pastes an empty first line (nor `"fix it\n\r"` an empty last
+      // one). The leading match ends at a line break, so the first real line keeps its
+      // indentation.
+      const textPart = input
+        .replace(/\r/g, '')
+        .replace(/^\s*\n/, '')
+        .trimEnd();
 
       if (textPart && hasCarriageReturn) {
         // Send text first, then Enter as a SEPARATE tmux command after a short delay.
diff --git a/test/tmux-submit-paste.test.ts b/test/tmux-submit-paste.test.ts
index e76cf820..39eb1d55 100644
--- a/test/tmux-submit-paste.test.ts
+++ b/test/tmux-submit-paste.test.ts
@@ -261,6 +261,11 @@ describe('sendInput line breaks', () => {
     await multi.sendInput('s1', '\r\n\r\none\ntwo\r');
     expect(bufferText(multi.ran[0])).toBe('one\ntwo');
 
+    // A blank first line made of spaces is dropped too; the first real line keeps its indentation.
+    const spaced = managerWithSession();
+    await spaced.sendInput('s1', '  \n\t\n  fix it\nnow\r');
+    expect(bufferText(spaced.ran[0])).toBe('  fix it\nnow');
+
     // Without an Enter, what is left is one line, so it is typed like any other.
     const typed = managerWithSession();
     await typed.sendInput('s1', '\n\njust type');