diff --git a/src/r_segs.cpp b/src/r_segs.cpp
index b738b1c10..bca838cbe 100644
--- a/src/r_segs.cpp
+++ b/src/r_segs.cpp
@@ -227,6 +227,7 @@ void R_RenderMaskedSegRange (drawseg_t *ds, int x1, int x2)
 	sector_t	tempsec;		// killough 4/13/98
 	fixed_t		texheight, texheightscale;
 	bool		notrelevant = false;
+	fixed_t		rowoffset;
 
 	const sector_t *sec;
 
@@ -328,7 +329,7 @@ void R_RenderMaskedSegRange (drawseg_t *ds, int x1, int x2)
 		dc_texturemid = MIN (frontsector->GetPlaneTexZ(sector_t::ceiling), backsector->GetPlaneTexZ(sector_t::ceiling));
 	}
 
-	fixed_t rowoffset = curline->sidedef->GetTextureYOffset(side_t::mid);
+	rowoffset = curline->sidedef->GetTextureYOffset(side_t::mid);
 
 	if (!(curline->linedef->flags & ML_WRAP_MIDTEX) &&
 		!(curline->sidedef->Flags & WALLF_WRAP_MIDTEX))
diff --git a/src/sound/music_dumb.cpp b/src/sound/music_dumb.cpp
index 8b196e7cd..1e9b6d6fc 100644
--- a/src/sound/music_dumb.cpp
+++ b/src/sound/music_dumb.cpp
@@ -129,6 +129,7 @@ CVAR(Bool, mod_autochip,				false, CVAR_ARCHIVE|CVAR_GLOBALCONFIG);
 CVAR(Int,  mod_autochip_size_force,		100,   CVAR_ARCHIVE|CVAR_GLOBALCONFIG);
 CVAR(Int,  mod_autochip_size_scan,		500,   CVAR_ARCHIVE|CVAR_GLOBALCONFIG);
 CVAR(Int,  mod_autochip_scan_threshold, 12,	   CVAR_ARCHIVE|CVAR_GLOBALCONFIG);
+CVAR(Float, mod_dumb_mastervolume,		1.f,   CVAR_ARCHIVE|CVAR_GLOBALCONFIG);
 
 // PRIVATE DATA DEFINITIONS ------------------------------------------------
 
@@ -974,7 +975,7 @@ bool input_mod::read(SoundStream *stream, void *buffer, int sizebytes, void *use
 			// Convert to float
 			for (int i = 0; i < written * 2; ++i)
 			{
-				((float *)buffer)[i] = ((int *)buffer)[i] / (float)(1 << 24);
+				((float *)buffer)[i] = (((int *)buffer)[i] / (float)(1 << 24)) * mod_dumb_mastervolume;
 			}
 		}
 		buffer = (BYTE *)buffer + written * 8;
diff --git a/src/sound/oalsound.h b/src/sound/oalsound.h
index 4f6bae396..de9789f22 100644
--- a/src/sound/oalsound.h
+++ b/src/sound/oalsound.h
@@ -7,6 +7,8 @@
 
 #ifndef NO_OPENAL
 
+#define AL_NO_PROTOTYPES
+
 #include "al.h"
 #include "alc.h"
 
diff --git a/wadsrc/static/menudef.txt b/wadsrc/static/menudef.txt
index 8bd205636..268787a2b 100644
--- a/wadsrc/static/menudef.txt
+++ b/wadsrc/static/menudef.txt
@@ -1663,6 +1663,7 @@ OptionMenu ModReplayerOptions
 	Title "MODULE REPLAYER OPTIONS"
 	Option "Replayer engine",		"mod_dumb", "ModReplayers"
 	StaticText " "
+	Slider "Master Volume",			"mod_dumb_mastervolume", 1, 32, 1, 1
 	Option "Sample rate",			"mod_samplerate", "SampleRates", "mod_dumb"
 	Option "Quality",				"mod_interp", "ModQuality", "mod_dumb"
 	Option "Volume ramping",		"mod_volramp", "ModVolumeRamps", "mod_dumb"