diff --git a/lib/internal/streams/readable.js b/lib/internal/streams/readable.js
index 1cba326970d4a8..fb587622550452 100644
--- a/lib/internal/streams/readable.js
+++ b/lib/internal/streams/readable.js
@@ -258,7 +258,7 @@ ObjectDefineProperties(ReadableState.prototype, {
 
 
 function ReadableState(options, stream, isDuplex) {
-  // Bit map field to store ReadableState more effciently with 1 bit per field
+  // Bit map field to store ReadableState more efficiently with 1 bit per field
   // instead of a V8 slot per field.
   this[kState] = kEmitClose | kAutoDestroy | kConstructed | kSync;
 
diff --git a/lib/internal/streams/transform.js b/lib/internal/streams/transform.js
index 42e1adda618b87..2f4d498bc780a3 100644
--- a/lib/internal/streams/transform.js
+++ b/lib/internal/streams/transform.js
@@ -180,7 +180,7 @@ Transform.prototype._write = function(chunk, encoding, callback) {
 
     if (rState.ended) {
       // If user has called this.push(null) we have to
-      // delay the callback to properly progate the new
+      // delay the callback to properly propagate the new
       // state.
       process.nextTick(callback);
     } else if (
diff --git a/lib/internal/streams/utils.js b/lib/internal/streams/utils.js
index d7d76783274e2f..4b359279556592 100644
--- a/lib/internal/streams/utils.js
+++ b/lib/internal/streams/utils.js
@@ -8,7 +8,7 @@ const {
 } = primordials;
 
 // We need to use SymbolFor to make these globally available
-// for interopt with readable-stream, i.e. readable-stream
+// for interoperability with readable-stream, i.e. readable-stream
 // and node core needs to be able to read/write private state
 // from each other for proper interoperability.
 const kIsDestroyed = SymbolFor('nodejs.stream.destroyed');
diff --git a/lib/internal/streams/writable.js b/lib/internal/streams/writable.js
index 96443f1c7898fb..ea89abf97c7604 100644
--- a/lib/internal/streams/writable.js
+++ b/lib/internal/streams/writable.js
@@ -300,7 +300,7 @@ ObjectDefineProperties(WritableState.prototype, {
 });
 
 function WritableState(options, stream, isDuplex) {
-  // Bit map field to store WritableState more effciently with 1 bit per field
+  // Bit map field to store WritableState more efficiently with 1 bit per field
   // instead of a V8 slot per field.
   this[kState] = kSync | kConstructed | kEmitClose | kAutoDestroy;