diff --git a/aegisub/Makefile.inc.in b/aegisub/Makefile.inc.in
index 959ed8a67..15d33626f 100644
--- a/aegisub/Makefile.inc.in
+++ b/aegisub/Makefile.inc.in
@@ -37,6 +37,7 @@ LIB_SHARED_LINK_OSX = -dynamiclib -Wl,-undefined -Wl,dynamic_lookup -compatibili
 # STRINGS
 #########
 AEGISUB_COMMAND      = @AEGISUB_COMMAND@
+AEGISUB_CATALOG      = @AEGISUB_CATALOG@
 BUILD_DATE           = @BUILD_DATE@
 PACKAGE_TARNAME      = aegisub-@BUILD_GIT_VERSION_STRING@
 PACKAGE_DEBUG        = @PACKAGE_DEBUG@
diff --git a/aegisub/configure.in b/aegisub/configure.in
index 99b2a316b..709b55171 100644
--- a/aegisub/configure.in
+++ b/aegisub/configure.in
@@ -68,6 +68,14 @@ AS_IF([test x$build_darwin = xyes],
 AC_SUBST(AEGISUB_COMMAND)
 AC_DEFINE_UNQUOTED([AEGISUB_COMMAND], ["${AEGISUB_COMMAND}"], [Name of the Aegisub executable])
 
+# Name of gettext catalog.
+# On OS X everything goes in an app bundle so no point in versioning the executable
+AS_IF([test x$build_darwin = xyes],
+      [AEGISUB_CATALOG="aegisub"],
+      [AEGISUB_CATALOG="aegisub-30"])
+AC_SUBST(AEGISUB_CATALOG)
+AC_DEFINE_UNQUOTED([AEGISUB_CATALOG], ["${AEGISUB_CATALOG}"], [Name of the Aegisub gettext catalog])
+
 # Handle location of desktop files: http://freedesktop.org/wiki/Specifications/desktop-entry-spec
 AC_ARG_WITH(desktop-dir,
             AS_HELP_STRING([--with-desktop-dir=PATH],[desktop file locations [PREFIX/share/applications]]))
diff --git a/aegisub/po/Makefile b/aegisub/po/Makefile
index b3af95010..72605e5db 100644
--- a/aegisub/po/Makefile
+++ b/aegisub/po/Makefile
@@ -38,8 +38,8 @@ all: $(MO)
 install:
 	@$(BIN_MKDIR) -p $(addsuffix /LC_MESSAGES/, $(addprefix $(DESTDIR)$(P_LOCALE)/, $(basename $(PO))))
 	@for i in $(basename $(PO)); do \
-		echo $(BIN_INSTALL) $$i.mo $(DESTDIR)$(P_LOCALE)/$$i/LC_MESSAGES/$(AEGISUB_COMMAND).mo; \
-		$(BIN_INSTALL) $$i.mo $(DESTDIR)$(P_LOCALE)/$$i/LC_MESSAGES/$(AEGISUB_COMMAND).mo; \
+		echo $(BIN_INSTALL) $$i.mo $(DESTDIR)$(P_LOCALE)/$$i/LC_MESSAGES/$(AEGISUB_CATALOG).mo; \
+		$(BIN_INSTALL) $$i.mo $(DESTDIR)$(P_LOCALE)/$$i/LC_MESSAGES/$(AEGISUB_CATALOG).mo; \
 	done
 
 
diff --git a/aegisub/src/aegisublocale.cpp b/aegisub/src/aegisublocale.cpp
index 0e826ad12..e348e3052 100644
--- a/aegisub/src/aegisublocale.cpp
+++ b/aegisub/src/aegisublocale.cpp
@@ -97,7 +97,7 @@ void AegisubLocale::Init(int language) {
 	locale->AddCatalogLookupPathPrefix(StandardPaths::DecodePath("?data/locale/"));
 	locale->AddCatalog("aegisub");
 #else
-	locale->AddCatalog(AEGISUB_COMMAND);
+	locale->AddCatalog(AEGISUB_CATALOG);
 #endif
 
 	locale->AddCatalog("wxstd");
@@ -213,7 +213,7 @@ wxArrayInt AegisubLocale::GetAvailableLanguages() {
 
 		// If the locale file doesn't exist then don't list it as an option.
 		wxString locDir = wxStandardPaths::Get().GetLocalizedResourcesDir(langs[i], wxStandardPathsBase::ResourceCat_Messages);
-		wxFileName file(wxString::Format("%s/%s.mo", locDir, AEGISUB_COMMAND));
+		wxFileName file(wxString::Format("%s/%s.mo", locDir, AEGISUB_CATALOG));
 		if (lang && file.FileExists()) final.Add(lang->Language);
 	}
 #endif