diff --git a/game-music-emu/gme/Gbs_Emu.cpp b/game-music-emu/gme/Gbs_Emu.cpp
index a2b1d613f..83aefb424 100644
--- a/game-music-emu/gme/Gbs_Emu.cpp
+++ b/game-music-emu/gme/Gbs_Emu.cpp
@@ -18,8 +18,8 @@ Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */
 
 #include "blargg_source.h"
 
-Gbs_Emu::equalizer_t const Gbs_Emu::handheld_eq   = { -47.0, 2000 };
-Gbs_Emu::equalizer_t const Gbs_Emu::headphones_eq = {   0.0,  300 };
+Gbs_Emu::equalizer_t const Gbs_Emu::handheld_eq   = { -47.0, 2000, 0, 0, 0, 0, 0, 0, 0, 0 };
+Gbs_Emu::equalizer_t const Gbs_Emu::headphones_eq = {   0.0,  300, 0, 0, 0, 0, 0, 0, 0, 0 };
 
 Gbs_Emu::Gbs_Emu()
 {
@@ -39,7 +39,7 @@ Gbs_Emu::Gbs_Emu()
 	set_max_initial_silence( 21 );
 	set_gain( 1.2 );
 	
-	static equalizer_t const eq = { -1.0, 120 };
+	static equalizer_t const eq = { -1.0, 120, 0, 0, 0, 0, 0, 0, 0, 0 };
 	set_equalizer( eq );
 }
 
diff --git a/game-music-emu/gme/Music_Emu.cpp b/game-music-emu/gme/Music_Emu.cpp
index f01024ce3..b0f3f71d5 100644
--- a/game-music-emu/gme/Music_Emu.cpp
+++ b/game-music-emu/gme/Music_Emu.cpp
@@ -24,7 +24,7 @@ int const silence_threshold = 0x10;
 long const fade_block_size = 512;
 int const fade_shift = 8; // fade ends with gain at 1.0 / (1 << fade_shift)
 
-Music_Emu::equalizer_t const Music_Emu::tv_eq = { -8.0, 180 };
+Music_Emu::equalizer_t const Music_Emu::tv_eq = { -8.0, 180, 0, 0, 0, 0, 0, 0, 0, 0 };
 
 void Music_Emu::clear_track_vars()
 {
diff --git a/game-music-emu/gme/Nsf_Emu.cpp b/game-music-emu/gme/Nsf_Emu.cpp
index 15f9e0b46..59d9b98cf 100644
--- a/game-music-emu/gme/Nsf_Emu.cpp
+++ b/game-music-emu/gme/Nsf_Emu.cpp
@@ -31,8 +31,8 @@ int const fme7_flag  = 0x20;
 
 long const clock_divisor = 12;
 
-Nsf_Emu::equalizer_t const Nsf_Emu::nes_eq     = {  -1.0, 80 };
-Nsf_Emu::equalizer_t const Nsf_Emu::famicom_eq = { -15.0, 80 };
+Nsf_Emu::equalizer_t const Nsf_Emu::nes_eq     = {  -1.0, 80, 0, 0, 0, 0, 0, 0, 0, 0 };
+Nsf_Emu::equalizer_t const Nsf_Emu::famicom_eq = { -15.0, 80, 0, 0, 0, 0, 0, 0, 0, 0 };
 
 int Nsf_Emu::pcm_read( void* emu, nes_addr_t addr )
 {
diff --git a/game-music-emu/gme/Vgm_Emu.cpp b/game-music-emu/gme/Vgm_Emu.cpp
index fc5394480..fe4be10a5 100644
--- a/game-music-emu/gme/Vgm_Emu.cpp
+++ b/game-music-emu/gme/Vgm_Emu.cpp
@@ -36,7 +36,7 @@ Vgm_Emu::Vgm_Emu()
 	
 	set_silence_lookahead( 1 ); // tracks should already be trimmed
 	
-	static equalizer_t const eq = { -14.0, 80 };
+	static equalizer_t const eq = { -14.0, 80, 0, 0, 0, 0, 0, 0, 0, 0 };
 	set_equalizer( eq );
 }
 
diff --git a/game-music-emu/gme/gme.cpp b/game-music-emu/gme/gme.cpp
index 23e7198d3..c9154c7a4 100644
--- a/game-music-emu/gme/gme.cpp
+++ b/game-music-emu/gme/gme.cpp
@@ -337,7 +337,7 @@ void      GMEAPI gme_set_equalizer  ( Music_Emu* me, gme_equalizer_t const* eq )
 
 void GMEAPI gme_equalizer( Music_Emu const* me, gme_equalizer_t* out )
 {
-	gme_equalizer_t e = { };
+	gme_equalizer_t e = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
 	e.treble = me->equalizer().treble;
 	e.bass   = me->equalizer().bass;
 	*out = e;
diff --git a/src/m_argv.cpp b/src/m_argv.cpp
index 457a1b337..54d9ffda4 100644
--- a/src/m_argv.cpp
+++ b/src/m_argv.cpp
@@ -55,6 +55,7 @@ DArgs::DArgs()
 //===========================================================================
 
 DArgs::DArgs(const DArgs &other)
+: DObject()
 {
 	Argv = other.Argv;
 }
diff --git a/src/nodebuild_utility.cpp b/src/nodebuild_utility.cpp
index ef79ac4d9..35842f76a 100644
--- a/src/nodebuild_utility.cpp
+++ b/src/nodebuild_utility.cpp
@@ -417,7 +417,7 @@ void FNodeBuilder::FindPolyContainers (TArray<FPolyStart> &spots, TArray<FPolySt
 				// Scan right for the seg closest to the polyobject's center after it
 				// gets moved to its start spot.
 				fixed_t closestdist = FIXED_MAX;
-				DWORD closestseg = 0;
+				unsigned int closestseg = UINT_MAX;
 
 				P(Printf ("start %d,%d -- center %d, %d\n", spot->x>>16, spot->y>>16, center.x>>16, center.y>>16));
 
@@ -452,7 +452,7 @@ void FNodeBuilder::FindPolyContainers (TArray<FPolyStart> &spots, TArray<FPolySt
 						}
 					}
 				}
-				if (closestseg >= 0)
+				if (closestseg != UINT_MAX)
 				{
 					loop = MarkLoop (closestseg, loop);
 					P(Printf ("Found polyobj in sector %d (loop %d)\n", Segs[closestseg].frontsector,
diff --git a/src/p_mobj.cpp b/src/p_mobj.cpp
index 49c1d026c..a034e9d47 100644
--- a/src/p_mobj.cpp
+++ b/src/p_mobj.cpp
@@ -364,6 +364,7 @@ AActor::AActor () throw()
 }
 
 AActor::AActor (const AActor &other) throw()
+	: DThinker()
 {
 	memcpy (&x, &other.x, (BYTE *)&this[1] - (BYTE *)&x);
 }
diff --git a/src/tempfiles.h b/src/tempfiles.h
index 799014c16..beeb2bc1d 100644
--- a/src/tempfiles.h
+++ b/src/tempfiles.h
@@ -49,7 +49,7 @@ public:
 	FTempFileName (const char *prefix=NULL);
 	~FTempFileName ();
 
-	operator const char * const () { return Name; }
+	operator const char * () { return Name; }
 	const char * GetName () const { return Name; }
 
 private:
diff --git a/src/w_wad.cpp b/src/w_wad.cpp
index 13e7ff14a..84da1c474 100644
--- a/src/w_wad.cpp
+++ b/src/w_wad.cpp
@@ -1212,6 +1212,7 @@ FWadLump::FWadLump ()
 }
 
 FWadLump::FWadLump (const FWadLump &copy)
+: FileReader()
 {
 	// This must be defined isn't called.
 	File = copy.File;