diff --git a/include/jmmt/FourCCObject.h b/include/jmmt/FourCCObject.h
index 26de829..7457c2d 100644
--- a/include/jmmt/FourCCObject.h
+++ b/include/jmmt/FourCCObject.h
@@ -8,7 +8,8 @@ namespace jmmt {
 
 	template <class TMagic, TMagic ValidMagic>
 	struct BasicStructureWithMagic {
-		constexpr static TMagic TypeMagic = ValidMagic;
+		using MagicType = TMagic;
+		constexpr static MagicType TypeMagic = ValidMagic;
 	};
 
 	template <uint32_t ValidMagic>
diff --git a/include/jmmt/package.h b/include/jmmt/package.h
index 294a7ab..f3c52d6 100644
--- a/include/jmmt/package.h
+++ b/include/jmmt/package.h
@@ -22,7 +22,7 @@ namespace jmmt {
 	};
 
 	struct PackageGroup : public FourCCMagic<0x50524750 /* 'PGRP' */> {
-		uint32_t magic;
+		MagicType magic;
 		uint32_t groupNameCrc;
 
 		uint32_t fileCount;
@@ -30,7 +30,7 @@ namespace jmmt {
 	};
 
 	struct PackageFile : public FourCCMagic<0x4C494650 /* 'PFIL' */> {
-		uint32_t magic;
+		MagicType magic;
 		uint32_t unk[2]; // Don't know what these are?
 
 		// Sequence number of the chunk.