diff --git a/src/p_ceiling.cpp b/src/p_ceiling.cpp
index 096333bbb..00af933ef 100644
--- a/src/p_ceiling.cpp
+++ b/src/p_ceiling.cpp
@@ -205,7 +205,7 @@ void DCeiling::Tick ()
 				case ceilCrushAndRaise:
 				case ceilLowerAndCrush:
 					if (m_CrushMode == ECrushMode::crushSlowdown)
-						m_Speed = FRACUNIT / 8;
+						m_Speed = 1. / 8;
 						break;
 
 				default:
diff --git a/src/p_doors.cpp b/src/p_doors.cpp
index 24af77194..ba2fba399 100644
--- a/src/p_doors.cpp
+++ b/src/p_doors.cpp
@@ -254,7 +254,7 @@ void DDoor::DoorSound(bool raise, DSeqNode *curseq) const
 
 	if (m_Sector->Flags & SECF_SILENTMOVE) return;
 
-	if (m_Speed >= FRACUNIT*8)
+	if (m_Speed >= 8)
 	{
 		choice += 2;
 	}
diff --git a/src/p_floor.cpp b/src/p_floor.cpp
index 9588e8e1c..9ad68c3b1 100644
--- a/src/p_floor.cpp
+++ b/src/p_floor.cpp
@@ -615,7 +615,7 @@ bool EV_BuildStairs (int tag, DFloor::EStair type, line_t *line,
 		floor->m_PauseTime = 0;
 		floor->m_StepTime = floor->m_PerStepTime = persteptime;
 
-		floor->m_Crush = (!(usespecials & DFloor::stairUseSpecials) && speed == 4*FRACUNIT) ? 10 : -1; //jff 2/27/98 fix uninitialized crush field
+		floor->m_Crush = (!(usespecials & DFloor::stairUseSpecials) && speed == 4) ? 10 : -1; //jff 2/27/98 fix uninitialized crush field
 		floor->m_Hexencrush = false;
 
 		floor->m_Speed = speed;
diff --git a/src/p_local.h b/src/p_local.h
index 4a68c236c..0dd0dca68 100644
--- a/src/p_local.h
+++ b/src/p_local.h
@@ -51,7 +51,6 @@ struct FTranslatedLineTarget;
 // mapblocks are used to check movement
 // against lines and things
 #define MAPBLOCKUNITS	128
-#define MAPBLOCKSIZE	(MAPBLOCKUNITS*FRACUNIT)
 
 // Inspired by Maes
 extern int bmapnegx;
diff --git a/src/p_spec.cpp b/src/p_spec.cpp
index 7eaab5dde..037a12940 100644
--- a/src/p_spec.cpp
+++ b/src/p_spec.cpp
@@ -1131,7 +1131,7 @@ void P_InitSectorSpecial(sector_t *sector, int special, bool nothinkers)
 		break;
 			
 	case dSector_DoorCloseIn30:
-		new DDoor(sector, DDoor::doorWaitClose, FRACUNIT * 2, 0, 0, 30 * TICRATE);
+		new DDoor(sector, DDoor::doorWaitClose, 2, 0, 0, 30 * TICRATE);
 		break;
 			
 	case dDamage_End:
@@ -1147,7 +1147,7 @@ void P_InitSectorSpecial(sector_t *sector, int special, bool nothinkers)
 		break;
 
 	case dSector_DoorRaiseIn5Mins:
-		new DDoor (sector, DDoor::doorWaitRaise, 2*FRACUNIT, TICRATE*30/7, 0, 5*60*TICRATE);
+		new DDoor (sector, DDoor::doorWaitRaise, 2, TICRATE*30/7, 0, 5*60*TICRATE);
 		break;
 
 	case dFriction_Low:
diff --git a/src/posix/sdl/i_timer.cpp b/src/posix/sdl/i_timer.cpp
index fa08659a1..cad3000ba 100644
--- a/src/posix/sdl/i_timer.cpp
+++ b/src/posix/sdl/i_timer.cpp
@@ -184,7 +184,7 @@ double I_GetTimeFrac (uint32 *ms)
 	if (ms) *ms = TicStart + (1000 / TICRATE);
 	if (TicStart == 0)
 	{
-		return FRACUNIT;
+		return 1;
 	}
 	else
 	{
diff --git a/src/wi_stuff.cpp b/src/wi_stuff.cpp
index d568051ae..108edff3b 100644
--- a/src/wi_stuff.cpp
+++ b/src/wi_stuff.cpp
@@ -722,7 +722,7 @@ static int WI_DrawCharPatch (FFont *font, int charcode, int x, int y, EColorRang
 	int width;
 	screen->DrawTexture(font->GetChar(charcode, &width), x, y,
 		nomove ? DTA_CleanNoMove : DTA_Clean, true,
-		DTA_ShadowAlpha, (gameinfo.gametype & GAME_DoomChex) ? 0 : FRACUNIT/2,
+		DTA_ShadowAlpha, (gameinfo.gametype & GAME_DoomChex) ? 0 : OPAQUE/2,
 		DTA_Translation, font->GetColorTranslation(translation),
 		TAG_DONE);
 	return x - width;