diff --git a/src/p_mobj.h b/src/p_mobj.h
index c7ab1f364..2dfeff0a4 100644
--- a/src/p_mobj.h
+++ b/src/p_mobj.h
@@ -162,7 +162,7 @@ typedef enum
 	// Disable momentum-based squash and stretch.
 	MF_NOSQUISH         = 1<<30,
 	// Disable hitlag for this object
-	MF_NOHITLAGFORME 	= 1<<31,
+	MF_NOHITLAGFORME    = (INT32)(1U<<31),
 	// no more free slots, next up I suppose we can get rid of shit like MF_BOXICON?
 } mobjflag_t;
 
diff --git a/src/p_saveg.c b/src/p_saveg.c
index 0561d365a..5ebfc8478 100644
--- a/src/p_saveg.c
+++ b/src/p_saveg.c
@@ -1527,7 +1527,7 @@ typedef enum
 	MD_DSCALE      = 1<<28,
 	MD_BLUEFLAG    = 1<<29,
 	MD_REDFLAG     = 1<<30,
-	MD_MORE        = 1<<31
+	MD_MORE        = (INT32)(1U<<31)
 } mobj_diff_t;
 
 typedef enum
diff --git a/src/r_defs.h b/src/r_defs.h
index c69d78d64..a466c856c 100644
--- a/src/r_defs.h
+++ b/src/r_defs.h
@@ -150,7 +150,7 @@ typedef enum
 	FF_SPINBUST          = 0x10000000, ///< Used with ::FF_BUSTUP. Also bustable if you're in your spinning frames.
 	FF_STRONGBUST        = 0x20000000, ///< Used with ::FF_BUSTUP. Only bustable by "strong" characters (Knuckles) and abilities (bouncing, twinspin, melee).
 	FF_RIPPLE            = 0x40000000, ///< Ripple the flats
-	FF_COLORMAPONLY      = 0x80000000, ///< Only copy the colormap, not the lightlevel
+	FF_COLORMAPONLY      = (INT32)0x80000000, ///< Only copy the colormap, not the lightlevel
 	FF_GOOWATER          = FF_SHATTERBOTTOM, ///< Used with ::FF_SWIMMABLE. Makes thick bouncey goop.
 } ffloortype_e;
 
@@ -775,7 +775,7 @@ typedef enum
 	RF_MODULATE			= ((AST_MODULATE-1)<<RF_BLENDSHIFT),
 	RF_OVERLAY			= ((AST_OVERLAY-1)<<RF_BLENDSHIFT),
 
-	RF_TRANSMASK       	= 0xF0000000,   // --Transparency override
+	RF_TRANSMASK       	= (INT32)0xF0000000,   // --Transparency override
 	RF_TRANSSHIFT		= (7*4),
 	RF_TRANS10       	= (1<<RF_TRANSSHIFT),   // 10%
 	RF_TRANS20       	= (2<<RF_TRANSSHIFT),   // 20%
@@ -784,8 +784,8 @@ typedef enum
 	RF_TRANS50       	= (5<<RF_TRANSSHIFT),   // 50%
 	RF_TRANS60       	= (6<<RF_TRANSSHIFT),   // 60%
 	RF_TRANS70       	= (7<<RF_TRANSSHIFT),   // 70%
-	RF_TRANS80       	= (8<<RF_TRANSSHIFT),   // 80%
-	RF_TRANS90       	= (9<<RF_TRANSSHIFT),   // 90%
+	RF_TRANS80       	= (INT32)(8U<<RF_TRANSSHIFT),   // 80%
+	RF_TRANS90       	= (INT32)(9U<<RF_TRANSSHIFT),   // 90%
 	RF_GHOSTLY			= (RF_TRANS80 | RF_FULLBRIGHT),
 	RF_GHOSTLYMASK		= (RF_TRANSMASK | RF_FULLBRIGHT),
 } renderflags_t;