diff --git a/FPEngine.h b/FPEngine.h
index 241fb3078..89f3d5102 100644
--- a/FPEngine.h
+++ b/FPEngine.h
@@ -139,7 +139,7 @@ class FPProbe;
 
 class Target;
 class FingerPrintResultsIPv6;
-class FingerMatch;
+struct FingerMatch;
 
 /******************************************************************************
  * CONSTANT DEFINITIONS                                                       *
diff --git a/NmapOps.h b/NmapOps.h
index fb13f4d6a..5728a506a 100644
--- a/NmapOps.h
+++ b/NmapOps.h
@@ -133,7 +133,7 @@
 #include <map>
 
 class FingerPrintDB;
-class FingerMatch;
+struct FingerMatch;
 
 class NmapOps {
  public: