diff --git a/Ghidra/Framework/Docking/src/main/java/docking/widgets/textfield/FixedSizeIntegerTextField.java b/Ghidra/Framework/Docking/src/main/java/docking/widgets/textfield/FixedSizeIntegerTextField.java
index 358c3dafda..0d7e56ee55 100644
--- a/Ghidra/Framework/Docking/src/main/java/docking/widgets/textfield/FixedSizeIntegerTextField.java
+++ b/Ghidra/Framework/Docking/src/main/java/docking/widgets/textfield/FixedSizeIntegerTextField.java
@@ -110,6 +110,11 @@ public class FixedSizeIntegerTextField extends AbstractIntegerTextField {
 		minSignedValue = BigInteger.TWO.pow(bitSize - 1).negate();
 		maxSignedValue = BigInteger.TWO.pow(bitSize - 1).subtract(BigInteger.ONE);
 
+		// special case for bitSize == 1, signed makes no sense, so use unsigned min/max for both
+		if (bitSize == 1) {
+			minSignedValue = minUnsignedValue;
+			maxSignedValue = maxUnsignedValue;
+		}
 		BigInteger value = getValue();
 		this.bitSize = bitSize;
 		updateMinMax();