diff --git a/src/io/nayuki/fastqrcodegen/QrCode.java b/src/io/nayuki/fastqrcodegen/QrCode.java
index dcd958f..091bec5 100644
--- a/src/io/nayuki/fastqrcodegen/QrCode.java
+++ b/src/io/nayuki/fastqrcodegen/QrCode.java
@@ -356,7 +356,7 @@ public final class QrCode {
 			setModule(14 - i, 8, getBit(bits, i));
 		
 		// Draw second copy
-		for (int i = 0; i <= 7; i++)
+		for (int i = 0; i < 8; i++)
 			setModule(size - 1 - i, 8, getBit(bits, i));
 		for (int i = 8; i < 15; i++)
 			setModule(8, size - 15 + i, getBit(bits, i));
diff --git a/src/io/nayuki/fastqrcodegen/QrTemplate.java b/src/io/nayuki/fastqrcodegen/QrTemplate.java
index 931d9b0..3ccfb40 100644
--- a/src/io/nayuki/fastqrcodegen/QrTemplate.java
+++ b/src/io/nayuki/fastqrcodegen/QrTemplate.java
@@ -149,7 +149,7 @@ final class QrTemplate {
 			darkenFunctionModule(14 - i, 8, 0);
 		
 		// Draw second copy
-		for (int i = 0; i <= 7; i++)
+		for (int i = 0; i < 8; i++)
 			darkenFunctionModule(size - 1 - i, 8, 0);
 		for (int i = 8; i < 15; i++)
 			darkenFunctionModule(8, size - 15 + i, 0);