diff --git a/cpp/QrCode.cpp b/cpp/QrCode.cpp
index 450c4cc..51e6dad 100644
--- a/cpp/QrCode.cpp
+++ b/cpp/QrCode.cpp
@@ -358,6 +358,8 @@ void qrcodegen::QrCode::drawCodewords(const std::vector<uint8_t> &data) {
 					modules.at(y).at(x) = ((data.at(i >> 3) >> (7 - (i & 7))) & 1) != 0;
 					i++;
 				}
+				// If there are any remainder bits (0 to 7), they are already
+				// set to 0/false/white when the grid of modules was initialized
 			}
 		}
 	}
diff --git a/java/io/nayuki/qrcodegen/QrCode.java b/java/io/nayuki/qrcodegen/QrCode.java
index e00a120..3cad230 100644
--- a/java/io/nayuki/qrcodegen/QrCode.java
+++ b/java/io/nayuki/qrcodegen/QrCode.java
@@ -514,6 +514,8 @@ public final class QrCode {
 						modules[y][x] = ((data[i >>> 3] >>> (7 - (i & 7))) & 1) != 0;
 						i++;
 					}
+					// If there are any remainder bits (0 to 7), they are already
+					// set to 0/false/white when the grid of modules was initialized
 				}
 			}
 		}
diff --git a/javascript/qrcodegen.js b/javascript/qrcodegen.js
index 10d46a6..0b59066 100644
--- a/javascript/qrcodegen.js
+++ b/javascript/qrcodegen.js
@@ -415,6 +415,8 @@ var qrcodegen = new function() {
 							modules[y][x] = ((data[i >>> 3] >>> (7 - (i & 7))) & 1) != 0;
 							i++;
 						}
+						// If there are any remainder bits (0 to 7), they are already
+						// set to 0/false/white when the grid of modules was initialized
 					}
 				}
 			}
diff --git a/python/qrcodegen.py b/python/qrcodegen.py
index 97d5c35..f77b9a5 100644
--- a/python/qrcodegen.py
+++ b/python/qrcodegen.py
@@ -409,6 +409,8 @@ class QrCode(object):
 					if not self._isfunction[y][x] and i < len(data) * 8:
 						self._modules[y][x] = ((data[i >> 3] >> (7 - (i & 7))) & 1) != 0
 						i += 1
+					# If there are any remainder bits (0 to 7), they are already
+					# set to 0/false/white when the grid of modules was initialized
 		assert i == len(data) * 8