diff --git a/src/drivers/win/help.cpp b/src/drivers/win/help.cpp
index 3621d16b..3ff79447 100644
--- a/src/drivers/win/help.cpp
+++ b/src/drivers/win/help.cpp
@@ -2,16 +2,13 @@
 #include "help.h"
 #include <htmlhelp.h>
 
-void OpenHelpWindow(const char *subpage)
+using std::string;
+
+void OpenHelpWindow(string subpage)
 {
-	char helpFileName[MAX_PATH];
-	strcpy(helpFileName, BaseDirectory);
-	strcat(helpFileName, "\\fceux.chm");
-	if (subpage)
-	{
-		strcat(helpFileName, "::/");
-		strcat(helpFileName, subpage);
-		strcat(helpFileName, ".htm");
-	}
-	HtmlHelp(GetDesktopWindow(), helpFileName, HH_DISPLAY_TOPIC, (DWORD)NULL);
+	string helpFileName = BaseDirectory;
+	helpFileName += "\\fceux.chm";
+	if (subpage.length())
+		helpFileName = helpFileName + "::/" + subpage + ".htm";
+	HtmlHelp(GetDesktopWindow(), helpFileName.c_str(), HH_DISPLAY_TOPIC, (DWORD)NULL);
 }
diff --git a/src/drivers/win/help.h b/src/drivers/win/help.h
index 1c6947ef..153c7f9f 100644
--- a/src/drivers/win/help.h
+++ b/src/drivers/win/help.h
@@ -1,2 +1,3 @@
+#include <string>
 // Open a help window to the default topic, or to ::/subpage.htm
-void OpenHelpWindow(const char *subpage = NULL);
+void OpenHelpWindow(std::string subpage = "");