diff --git a/SConstruct b/SConstruct
index f02839b6f..608dcdc87 100644
--- a/SConstruct
+++ b/SConstruct
@@ -767,7 +767,7 @@ class DXXProgram(DXXCommon):
 'main/gamerend.cpp',
 'main/gamesave.cpp',
 'main/gameseg.cpp',
-'main/gauges.c',
+'main/gauges.cpp',
 'main/hostage.c',
 'main/hud.c',
 'main/inferno.c',
diff --git a/common/main/gauges.h b/common/main/gauges.h
index b31e1f052..4c0bf6ba2 100644
--- a/common/main/gauges.h
+++ b/common/main/gauges.h
@@ -48,8 +48,8 @@ extern bitmap_index Gauges_hires[MAX_GAUGE_BMS];    // hires gauges
 
 // Flags for gauges/hud stuff
 
-extern void add_points_to_score();
-extern void add_bonus_points_to_score();
+extern void add_points_to_score(int points);
+extern void add_bonus_points_to_score(int points);
 
 void render_gauges(void);
 void init_gauges(void);
diff --git a/similar/main/gauges.c b/similar/main/gauges.cpp
similarity index 99%
rename from similar/main/gauges.c
rename to similar/main/gauges.cpp
index 2394361e8..a5b9849c5 100644
--- a/similar/main/gauges.c
+++ b/similar/main/gauges.cpp
@@ -17,6 +17,7 @@ COPYRIGHT 1993-1999 PARALLAX SOFTWARE CORPORATION.  ALL RIGHTS RESERVED.
  *
  */
 
+#include <algorithm>
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
@@ -56,6 +57,8 @@ COPYRIGHT 1993-1999 PARALLAX SOFTWARE CORPORATION.  ALL RIGHTS RESERVED.
 #endif
 #include "args.h"
 
+using std::min;
+
 //bitmap numbers for gauges
 #define GAUGE_SHIELDS			0		//0..9, in decreasing order (100%,90%...0%)
 #define GAUGE_INVULNERABLE		10		//10..19