diff --git a/gcc/d/d-builtins.cc b/gcc/d/d-builtins.cc
index cf998d22721..f6ea026bdcf 100644
--- a/gcc/d/d-builtins.cc
+++ b/gcc/d/d-builtins.cc
@@ -956,6 +956,9 @@ d_build_d_type_nodes (void)
   d_bool_type = make_unsigned_type (1);
   TREE_SET_CODE (d_bool_type, BOOLEAN_TYPE);
 
+  d_bool_false_node = TYPE_MIN_VALUE (d_bool_type);
+  d_bool_true_node = TYPE_MAX_VALUE (d_bool_type);
+
   char8_type_node = make_unsigned_type (8);
   TYPE_STRING_FLAG (char8_type_node) = 1;
 
diff --git a/gcc/d/d-codegen.cc b/gcc/d/d-codegen.cc
index 91ddb1b657e..270cb5e2be6 100644
--- a/gcc/d/d-codegen.cc
+++ b/gcc/d/d-codegen.cc
@@ -1115,7 +1115,7 @@ build_array_struct_comparison (tree_code code, StructDeclaration *sd,
 	if (length == 0 || result OP 0) break;  */
   t = build_boolop (EQ_EXPR, length, d_convert (lentype, integer_zero_node));
   t = build_boolop (TRUTH_ORIF_EXPR, t, build_boolop (code, result,
-						      boolean_false_node));
+						      d_bool_false_node));
   t = build1 (EXIT_EXPR, void_type_node, t);
   add_stmt (t);
 
diff --git a/gcc/d/d-convert.cc b/gcc/d/d-convert.cc
index 2b9d8e78fb6..71d7a41374e 100644
--- a/gcc/d/d-convert.cc
+++ b/gcc/d/d-convert.cc
@@ -132,13 +132,13 @@ d_truthvalue_conversion (tree expr)
       return expr;
 
     case INTEGER_CST:
-      return integer_zerop (expr) ? boolean_false_node
-				  : boolean_true_node;
+      return integer_zerop (expr) ? d_bool_false_node
+				  : d_bool_true_node;
 
     case REAL_CST:
       return real_compare (NE_EXPR, &TREE_REAL_CST (expr), &dconst0)
-	     ? boolean_true_node
-	     : boolean_false_node;
+	     ? d_bool_true_node
+	     : d_bool_false_node;
 
     case ADDR_EXPR:
       /* If we are taking the address of a decl that can never be null,
@@ -148,7 +148,7 @@ d_truthvalue_conversion (tree expr)
 	  warning (OPT_Waddress,
 		   "the address of %qD will always evaluate as %<true%>",
 		   TREE_OPERAND (expr, 0));
-	  return boolean_true_node;
+	  return d_bool_true_node;
 	}
       break;
 
diff --git a/gcc/d/d-tree.h b/gcc/d/d-tree.h
index ed26533feb4..7763695a106 100644
--- a/gcc/d/d-tree.h
+++ b/gcc/d/d-tree.h
@@ -444,6 +444,9 @@ enum d_tree_index
   DTI_NULL_ARRAY,
   DTI_BOTTOM_TYPE,
 
+  DTI_BOOL_FALSE,
+  DTI_BOOL_TRUE,
+
   DTI_MAX
 };
 
@@ -480,6 +483,9 @@ extern GTY(()) tree d_global_trees[DTI_MAX];
 #define null_array_node			d_global_trees[DTI_NULL_ARRAY]
 /* The bottom type, referred to as `noreturn` in code.  */
 #define noreturn_type_node		d_global_trees[DTI_BOTTOM_TYPE]
+/* D boolean values are always byte-sized, unlike boolean_type_node.  */
+#define d_bool_false_node		d_global_trees[DTI_BOOL_FALSE]
+#define d_bool_true_node		d_global_trees[DTI_BOOL_TRUE]
 
 /* A prefix for internal variables, which are not user-visible.  */
 #if !defined (NO_DOT_IN_LABEL)
diff --git a/gcc/d/modules.cc b/gcc/d/modules.cc
index 8d6c8f0f9ad..e3c1ef9f82e 100644
--- a/gcc/d/modules.cc
+++ b/gcc/d/modules.cc
@@ -330,7 +330,7 @@ static tree
 build_dso_cdtor_fn (bool ctor_p)
 {
   const char *name = ctor_p ? GDC_PREFIX ("dso_ctor") : GDC_PREFIX ("dso_dtor");
-  tree condition = ctor_p ? boolean_true_node : boolean_false_node;
+  tree condition = ctor_p ? d_bool_true_node : d_bool_false_node;
 
   /* Declaration of dso_ctor/dso_dtor is:
 
@@ -453,7 +453,7 @@ register_moduleinfo (Module *decl, tree minfo)
   d_finish_decl (dso_slot_node);
 
   dso_initialized_node = build_dso_registry_var (GDC_PREFIX ("dso_initialized"),
-						 boolean_type_node);
+						 d_bool_type);
   d_finish_decl (dso_initialized_node);
 
   /* Declare dso_ctor() and dso_dtor().  */
diff --git a/gcc/testsuite/gdc.dg/pr112270.d b/gcc/testsuite/gdc.dg/pr112270.d
new file mode 100644
index 00000000000..591c798fddd
--- /dev/null
+++ b/gcc/testsuite/gdc.dg/pr112270.d
@@ -0,0 +1,7 @@
+// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112270
+// { dg-do compile }
+class CPPNamespaceDeclaration { }
+bool isNamespaceEqual (CPPNamespaceDeclaration a)
+{
+    return a ? true : isNamespaceEqual(a);
+}