diff --git a/src/doomdef.h b/src/doomdef.h
index 3b066f8d8..12a9dbfe9 100644
--- a/src/doomdef.h
+++ b/src/doomdef.h
@@ -302,7 +302,7 @@ enum
 };
 
 // [RH] Compatibility flags.
-enum
+enum : unsigned int
 {
 	COMPATF_SHORTTEX		= 1 << 0,	// Use Doom's shortest texture around behavior?
 	COMPATF_STAIRINDEX		= 1 << 1,	// Don't fix loop index for stair building?
diff --git a/src/g_level.h b/src/g_level.h
index 6e1768c3a..b6b848674 100644
--- a/src/g_level.h
+++ b/src/g_level.h
@@ -125,7 +125,7 @@ struct FMapOptInfo
 	bool old;
 };
 
-enum ELevelFlags
+enum ELevelFlags : unsigned int
 {
 	LEVEL_NOINTERMISSION		= 0x00000001,
 	LEVEL_NOINVENTORYBAR		= 0x00000002,	// This effects Doom only, since it's the only one without a standard inventory bar.