diff --git a/std/experimental/allocator/building_blocks/region.d b/std/experimental/allocator/building_blocks/region.d
index 5713bae9592..b127c055f95 100644
--- a/std/experimental/allocator/building_blocks/region.d
+++ b/std/experimental/allocator/building_blocks/region.d
@@ -510,6 +510,7 @@ struct InSituRegion(size_t size, size_t minAlign = platformAlignment)
     else version (X86_64) enum growDownwards = Yes.growDownwards;
     else version (ARM) enum growDownwards = Yes.growDownwards;
     else version (AArch64) enum growDownwards = Yes.growDownwards;
+    else version (HPPA) enum growDownwards = No.growDownwards;
     else version (PPC) enum growDownwards = Yes.growDownwards;
     else version (PPC64) enum growDownwards = Yes.growDownwards;
     else version (MIPS32) enum growDownwards = Yes.growDownwards;
diff --git a/std/math.d b/std/math.d
index 8b50aa4eef8..0c5b7626538 100644
--- a/std/math.d
+++ b/std/math.d
@@ -5951,6 +5951,21 @@ nothrow @nogc:
                                  | inexactException,
         }
     }
+    else version (HPPA)
+    {
+        enum : ExceptionMask
+        {
+            inexactException      = 0x01,
+            underflowException    = 0x02,
+            overflowException     = 0x04,
+            divByZeroException    = 0x08,
+            invalidException      = 0x10,
+            severeExceptions   = overflowException | divByZeroException
+                                 | invalidException,
+            allExceptions      = severeExceptions | underflowException
+                                 | inexactException,
+        }
+    }
     else version (MIPS_Any)
     {
         enum : ExceptionMask
@@ -6100,6 +6115,10 @@ private:
     {
         alias ControlState = uint;
     }
+    else version (HPPA)
+    {
+        alias ControlState = uint;
+    }
     else version (PPC_Any)
     {
         alias ControlState = uint;