diff --git a/Rakefile b/Rakefile
index 4bd3dd4..68125e0 100644
--- a/Rakefile
+++ b/Rakefile
@@ -2,7 +2,7 @@ require 'pathname'
 
 def release_version
   return @release_version if @release_version
-  version_file = Pathname.new('wincent-icon-util_Version.h').read
+  version_file = Pathname.new('wincent-icon-util-version.h').read
   version_line = version_file.lines.find do |line|
     line =~ /\A#define\s+WO_INFO_PLIST_VERSION\s+(.+)\s*\z/
   end or raise "could not find version number"
diff --git a/wincent-icon-util_Version.h b/wincent-icon-util-version.h
similarity index 100%
rename from wincent-icon-util_Version.h
rename to wincent-icon-util-version.h
diff --git a/wincent-icon-util.m b/wincent-icon-util.m
index 59f685e..5a70734 100644
--- a/wincent-icon-util.m
+++ b/wincent-icon-util.m
@@ -29,7 +29,7 @@
 #pragma mark -
 #pragma mark Embedded information for what(1)
 
-#import "wincent-icon-util_Version.h"
+#import "wincent-icon-util-version.h"
 
 WO_SET_RCSID_STRING("Wincent Icon Utility", productname);
 WO_SET_RCSID_STRING("Version: " WO_MARKETING_VERSION, version);
diff --git a/wincent-icon-util.xcodeproj/project.pbxproj b/wincent-icon-util.xcodeproj/project.pbxproj
index 6cc7ad1..859ffcf 100644
--- a/wincent-icon-util.xcodeproj/project.pbxproj
+++ b/wincent-icon-util.xcodeproj/project.pbxproj
@@ -62,7 +62,7 @@
 		8DD76FA10486AA7600D96B5E /* wincent-icon-util */ = {isa = PBXFileReference; explicitFileType = "compiled.mach-o.executable"; includeInIndex = 0; path = "wincent-icon-util"; sourceTree = BUILT_PRODUCTS_DIR; };
 		BC06224C127FFCAD007BDE49 /* Info.plist */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
 		BC062258127FFE60007BDE49 /* sign.sh */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.script.sh; path = sign.sh; sourceTree = "<group>"; };
-		BC0625F312806867007BDE49 /* wincent-icon-util_Version.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = "wincent-icon-util_Version.h"; sourceTree = "<group>"; };
+		BC0625F312806867007BDE49 /* wincent-icon-util-version.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = "wincent-icon-util-version.h"; sourceTree = "<group>"; };
 		BC47976B1047E7C800092001 /* buildtools */ = {isa = PBXFileReference; lastKnownFileType = folder; path = buildtools; sourceTree = "<group>"; };
 		BC47989B1047E8D000092001 /* Package.sh */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.script.sh; name = Package.sh; path = buildtools/Package.sh; sourceTree = "<group>"; };
 		BC4798A21047E92900092001 /* LICENSE.rtf */ = {isa = PBXFileReference; lastKnownFileType = text.rtf; path = LICENSE.rtf; sourceTree = "<group>"; };
@@ -115,7 +115,7 @@
 		08FB7795FE84155DC02AAC07 /* Source */ = {
 			isa = PBXGroup;
 			children = (
-				BC0625F312806867007BDE49 /* wincent-icon-util_Version.h */,
+				BC0625F312806867007BDE49 /* wincent-icon-util-version.h */,
 				08FB7796FE84155DC02AAC07 /* wincent-icon-util.m */,
 			);
 			name = Source;
@@ -329,7 +329,7 @@
 			baseConfigurationReference = BC935B1E0C593E110017530E /* foundation-tool-target.xcconfig */;
 			buildSettings = {
 				INFOPLIST_FILE = Info.plist;
-				INFOPLIST_PREFIX_HEADER = "wincent-icon-util_Version.h";
+				INFOPLIST_PREFIX_HEADER = "wincent-icon-util-version.h";
 				OTHER_LDFLAGS = (
 					"-sectcreate",
 					__TEXT,
@@ -345,7 +345,7 @@
 			baseConfigurationReference = BC935B1E0C593E110017530E /* foundation-tool-target.xcconfig */;
 			buildSettings = {
 				INFOPLIST_FILE = Info.plist;
-				INFOPLIST_PREFIX_HEADER = "wincent-icon-util_Version.h";
+				INFOPLIST_PREFIX_HEADER = "wincent-icon-util-version.h";
 				OTHER_LDFLAGS = (
 					"-sectcreate",
 					__TEXT,