diff --git a/src/dcd/common/constants.d b/src/dcd/common/constants.d
index 0d01c0f..68c2771 100644
--- a/src/dcd/common/constants.d
+++ b/src/dcd/common/constants.d
@@ -69,16 +69,23 @@ immutable ConstantCompletion[] predefinedVersions = [
 	ConstantCompletion("ARM_SoftFloat"),
 	ConstantCompletion("ARM_SoftFP"),
 	ConstantCompletion("ARM_Thumb"),
+	ConstantCompletion("AsmJS"),
 	ConstantCompletion("assert"),
 	ConstantCompletion("BigEndian"),
 	ConstantCompletion("BSD"),
+	ConstantCompletion("Core"),
 	ConstantCompletion("CRuntime_Bionic"),
 	ConstantCompletion("CRuntime_DigitalMars"),
 	ConstantCompletion("CRuntime_Glibc"),
 	ConstantCompletion("CRuntime_Microsoft"),
+	ConstantCompletion("CRuntime_Musl"),
+	ConstantCompletion("CRuntime_UClibc"),
 	ConstantCompletion("Cygwin"),
 	ConstantCompletion("DigitalMars"),
 	ConstantCompletion("DragonFlyBSD"),
+	ConstantCompletion("D_AVX"),
+	ConstantCompletion("D_AVX2"),
+	ConstantCompletion("D_BetterC"),
 	ConstantCompletion("D_Coverage"),
 	ConstantCompletion("D_Ddoc"),
 	ConstantCompletion("D_HardFloat"),
@@ -143,12 +150,14 @@ immutable ConstantCompletion[] predefinedVersions = [
 	ConstantCompletion("SPARC_HardFloat"),
 	ConstantCompletion("SPARC_SoftFloat"),
 	ConstantCompletion("SPARC_V8Plus"),
+	ConstantCompletion("Std"),
 	ConstantCompletion("SystemZ"),
 	ConstantCompletion("SysV3"),
 	ConstantCompletion("SysV4"),
 	ConstantCompletion("TVOS"),
 	ConstantCompletion("unittest"),
 	ConstantCompletion("WatchOS"),
+	ConstantCompletion("WebAssembly"),
 	ConstantCompletion("Win32"),
 	ConstantCompletion("Win64"),
 	ConstantCompletion("Windows"),