diff --git a/Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/format/pe/ControlFlowGuard.java b/Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/format/pe/ControlFlowGuard.java
index ac8b765b31..fd2da24b3f 100644
--- a/Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/format/pe/ControlFlowGuard.java
+++ b/Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/format/pe/ControlFlowGuard.java
@@ -150,7 +150,13 @@ public class ControlFlowGuard {
 		}
 
 		for (Address target : getFunctionAddressesFromTable(program, tableData)) {
-			AbstractProgramLoader.markAsFunction(program, null, target);
+			if (program.getListing().getDefinedDataAt(target) == null) {
+				AbstractProgramLoader.markAsFunction(program, null, target);
+			}
+			else {
+				log.appendMsg("Unable to mark Control Flow Guard function at " + target + 
+					". Data is already defined there.");
+			}
 		}
 	}