diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9743772..992e2ac 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -317,13 +317,13 @@ set(INNOEXTRACT_SOURCES
 	src/util/load.cpp
 	src/util/log.hpp
 	src/util/log.cpp
+	src/util/math.hpp
 	src/util/output.hpp
 	src/util/storedenum.hpp
 	src/util/time.hpp
 	src/util/time.cpp
 	src/util/types.hpp
 	src/util/unique_ptr.hpp
-	src/util/util.hpp
 	src/util/windows.hpp
 	src/util/windows.cpp if WIN32
 	
diff --git a/src/crypto/iteratedhash.hpp b/src/crypto/iteratedhash.hpp
index 46d9e7a..8101a0a 100644
--- a/src/crypto/iteratedhash.hpp
+++ b/src/crypto/iteratedhash.hpp
@@ -30,8 +30,8 @@
 
 #include "crypto/checksum.hpp"
 #include "util/endian.hpp"
+#include "util/math.hpp"
 #include "util/types.hpp"
-#include "util/util.hpp"
 
 namespace crypto {
 
diff --git a/src/crypto/md5.cpp b/src/crypto/md5.cpp
index b42f1c2..b355b19 100644
--- a/src/crypto/md5.cpp
+++ b/src/crypto/md5.cpp
@@ -24,7 +24,7 @@
 
 #include "crypto/md5.hpp"
 
-#include "util/util.hpp"
+#include "util/math.hpp"
 
 namespace crypto {
 
diff --git a/src/crypto/sha1.cpp b/src/crypto/sha1.cpp
index 7d19eff..aece111 100644
--- a/src/crypto/sha1.cpp
+++ b/src/crypto/sha1.cpp
@@ -23,7 +23,7 @@
 
 #include "crypto/sha1.hpp"
 
-#include "util/util.hpp"
+#include "util/math.hpp"
 
 namespace crypto {
 
diff --git a/src/loader/offsets.cpp b/src/loader/offsets.cpp
index 4e227df..6647129 100644
--- a/src/loader/offsets.cpp
+++ b/src/loader/offsets.cpp
@@ -102,16 +102,15 @@ bool offsets::load_offsets_at(std::istream & is, boost::uint32_t pos) {
 	}
 	
 	char magic[12];
-	if(is.read(magic, std::streamsize(boost::size(magic))).fail()) {
+	if(is.read(magic, std::streamsize(sizeof(magic))).fail()) {
 		is.clear();
 		return false;
 	}
 	
 	setup::version_constant version = 0;
 	for(size_t i = 0; i < boost::size(known_setup_loader_versions); i++) {
-		BOOST_STATIC_ASSERT(ARRAY_SIZE(known_setup_loader_versions[i].magic)
-		                    == ARRAY_SIZE(magic));
-		if(!memcmp(magic, known_setup_loader_versions[i].magic, boost::size(magic))) {
+		BOOST_STATIC_ASSERT(sizeof(known_setup_loader_versions[i].magic) == sizeof(magic));
+		if(!memcmp(magic, known_setup_loader_versions[i].magic, sizeof(magic))) {
 			version = known_setup_loader_versions[i].version;
 			break;
 		}
@@ -122,7 +121,7 @@ bool offsets::load_offsets_at(std::istream & is, boost::uint32_t pos) {
 	
 	crypto::crc32 checksum;
 	checksum.init();
-	checksum.update(magic, boost::size(magic));
+	checksum.update(magic, sizeof(magic));
 	
 	if(version >= INNO_VERSION(5, 1,  5)) {
 		boost::uint32_t revision = checksum.load<boost::uint32_t>(is);
diff --git a/src/stream/block.cpp b/src/stream/block.cpp
index 4113e8c..41b6b83 100644
--- a/src/stream/block.cpp
+++ b/src/stream/block.cpp
@@ -42,7 +42,7 @@
 #include "util/enum.hpp"
 #include "util/load.hpp"
 #include "util/log.hpp"
-#include "util/util.hpp"
+#include "util/math.hpp"
 
 namespace io = boost::iostreams;
 
diff --git a/src/stream/chunk.cpp b/src/stream/chunk.cpp
index 3d64329..eadafc1 100644
--- a/src/stream/chunk.cpp
+++ b/src/stream/chunk.cpp
@@ -30,7 +30,6 @@
 #include "stream/restrict.hpp"
 #include "stream/slice.hpp"
 #include "util/log.hpp"
-#include "util/util.hpp"
 
 namespace io = boost::iostreams;
 
@@ -69,7 +68,7 @@ chunk_reader::pointer chunk_reader::get(slice_reader & base, const chunk & chunk
 		throw chunk_error("could not seek to chunk start");
 	}
 	
-	char magic[ARRAY_SIZE(chunk_id)];
+	char magic[sizeof(chunk_id)];
 	if(base.read(magic, 4) != 4 || memcmp(magic, chunk_id, boost::size(chunk_id))) {
 		throw chunk_error("bad chunk magic");
 	}
diff --git a/src/util/util.hpp b/src/util/math.hpp
similarity index 92%
rename from src/util/util.hpp
rename to src/util/math.hpp
index 8171f64..43aa858 100644
--- a/src/util/util.hpp
+++ b/src/util/math.hpp
@@ -19,10 +19,10 @@
  */
 
 /*!
- * Miscellaneous utility functions.
+ * Math helper functions.
  */
-#ifndef INNOEXTRACT_UTIL_UTIL_HPP
-#define INNOEXTRACT_UTIL_UTIL_HPP
+#ifndef INNOEXTRACT_UTIL_MATH_HPP
+#define INNOEXTRACT_UTIL_MATH_HPP
 
 #ifdef _MSC_VER
 #include <intrin.h>
@@ -30,9 +30,6 @@
 
 namespace util {
 
-//! Get the number of elements in a statically-sized array.
-#define ARRAY_SIZE(array) (sizeof(array)/sizeof(*(array)))
-
 //! Divide by a number and round up the result.
 template <typename T>
 T ceildiv(T num, T denom) {
@@ -132,4 +129,4 @@ inline boost::uint64_t rotl_fixed<boost::uint64_t>(boost::uint64_t x, unsigned i
 
 } // namespace util
 
-#endif // INNOEXTRACT_UTIL_UTIL_HPP
+#endif // INNOEXTRACT_UTIL_MATH_HPP
diff --git a/src/util/storedenum.hpp b/src/util/storedenum.hpp
index 0cddd0c..729265d 100644
--- a/src/util/storedenum.hpp
+++ b/src/util/storedenum.hpp
@@ -44,7 +44,7 @@ struct MapName { \
 	static const size_t count; \
 }; \
 const MapName::enum_type MapName::values[] = { __VA_ARGS__ }; \
-const size_t MapName::count = ARRAY_SIZE(MapName::values)
+const size_t MapName::count = (sizeof(MapName::values)/sizeof(*(MapName::values)))
 
 //! Declare a mapping from integers to enum elements to be used for \ref stored_enum
 #define STORED_ENUM_MAP(MapName, Default, /* elements */ ...) \
diff --git a/src/util/types.hpp b/src/util/types.hpp
index f3e2407..14dd228 100644
--- a/src/util/types.hpp
+++ b/src/util/types.hpp
@@ -30,7 +30,7 @@
 #include <boost/integer/static_min_max.hpp>
 #include <boost/integer.hpp>
 
-#include "util/util.hpp"
+#include "util/math.hpp"
 
 #include "configure.hpp"