diff --git a/indra/llinventory/llparcelflags.h b/indra/llinventory/llparcelflags.h
index 343044727..9d4884e32 100644
--- a/indra/llinventory/llparcelflags.h
+++ b/indra/llinventory/llparcelflags.h
@@ -68,7 +68,7 @@ const U32 PF_ALLOW_ALL_OBJECT_ENTRY		= 1 << 27;	// Allow all objects to enter a
 const U32 PF_ALLOW_GROUP_OBJECT_ENTRY	= 1 << 28;	// Only allow group (and owner) objects to enter the parcel
 const U32 PF_ALLOW_VOICE_CHAT			= 1 << 29;	// Allow residents to use voice chat on this parcel
 const U32 PF_USE_ESTATE_VOICE_CHAN      = 1 << 30;
-const U32 PF_DENY_AGEUNVERIFIED         = 1 << 31;  // Prevent residents who aren't age-verified 
+const U32 PF_DENY_AGEUNVERIFIED         = 1U << 31;  // Prevent residents who aren't age-verified 
 // NOTE: At one point we have used all of the bits.
 // We have deprecated two of them in 1.19.0 which *could* be reused,
 // but only after we are certain there are no simstates using those bits.
diff --git a/indra/llmath/llmath.h b/indra/llmath/llmath.h
index ecf324465..a802da5bd 100644
--- a/indra/llmath/llmath.h
+++ b/indra/llmath/llmath.h
@@ -395,7 +395,7 @@ inline U32 get_lower_power_two(U32 val, U32 max_power_two)
 {
 	if(!max_power_two)
 	{
-		max_power_two = 1 << 31 ;
+		max_power_two = 1U << 31 ;
 	}
 	if(max_power_two & (max_power_two - 1))
 	{
@@ -417,7 +417,7 @@ inline U32 get_next_power_two(U32 val, U32 max_power_two)
 {
 	if(!max_power_two)
 	{
-		max_power_two = 1 << 31 ;
+		max_power_two = 1U << 31 ;
 	}
 
 	if(val >= max_power_two)