diff --git a/src/add-ons/print/drivers/pdf/source/PDFWriter.rdef b/src/add-ons/print/drivers/pdf/source/PDFWriter.rdef
index a2c105c7df..d2787eb86a 100644
--- a/src/add-ons/print/drivers/pdf/source/PDFWriter.rdef
+++ b/src/add-ons/print/drivers/pdf/source/PDFWriter.rdef
@@ -24,7 +24,7 @@ resource app_signature "application/x-vnd.obos.pdfwriter";
    0000000E = ARGV_ONLY + BACKGROUND APP + EXCLUSIVE LAUNCH
    */
 
-resource app_flags 0x00000000;
+resource app_flags B_SINGLE_LAUNCH;
 
 /* BEOS:FILE_TYPES :
    "types" = "text/plain",
diff --git a/src/add-ons/tracker/filetype/FileType.rdef b/src/add-ons/tracker/filetype/FileType.rdef
index ea13321231..7890fcf8c2 100644
--- a/src/add-ons/tracker/filetype/FileType.rdef
+++ b/src/add-ons/tracker/filetype/FileType.rdef
@@ -5,7 +5,7 @@
 
 resource app_signature "application/x-vnd.obos.file-type";
 
-resource app_flags 0x00000001;
+resource app_flags B_MULTIPLE_LAUNCH;
 
 resource file_types message {
 	"types" = "application/x-be-resource",
diff --git a/src/add-ons/tracker/zipomatic/ZipOMatic.rdef b/src/add-ons/tracker/zipomatic/ZipOMatic.rdef
index 6636bd30e5..52143e4291 100644
--- a/src/add-ons/tracker/zipomatic/ZipOMatic.rdef
+++ b/src/add-ons/tracker/zipomatic/ZipOMatic.rdef
@@ -5,7 +5,7 @@
 
 resource app_signature "application/x-vnd.obos.zip-o-matic";
 
-resource app_flags 0x00000000;
+resource app_flags B_SINGLE_LAUNCH;
 
 resource file_types message {
 	"types" = "application/octet-stream"
diff --git a/src/apps/showimage/ShowImage.rdef b/src/apps/showimage/ShowImage.rdef
index 8d053b1b13..d52ccab929 100644
--- a/src/apps/showimage/ShowImage.rdef
+++ b/src/apps/showimage/ShowImage.rdef
@@ -24,7 +24,7 @@ resource app_signature "application/x-vnd.obos.showimage";
    0000000E = ARGV_ONLY + BACKGROUND APP + EXCLUSIVE LAUNCH
    */
 
-resource app_flags 0x00000000;
+resource app_flags B_SINGLE_LAUNCH;
 
 /* BEOS:FILE_TYPES :
    "types" = "text/plain",
diff --git a/src/apps/stylededit/StyledEdit.rdef b/src/apps/stylededit/StyledEdit.rdef
index 6a7473b819..a48c02cbe6 100644
--- a/src/apps/stylededit/StyledEdit.rdef
+++ b/src/apps/stylededit/StyledEdit.rdef
@@ -24,7 +24,7 @@ resource app_signature "application/x-vnd.obos.styled-edit";
    0000000E = ARGV_ONLY + BACKGROUND APP + EXCLUSIVE LAUNCH
    */
 
-resource app_flags 0x00000000;
+resource app_flags B_SINGLE_LAUNCH;
 
 /* BEOS:FILE_TYPES :
    "types" = "text/plain",
diff --git a/src/apps/terminal/Terminal.rdef b/src/apps/terminal/Terminal.rdef
index a0f6dbff82..a538ad017d 100644
--- a/src/apps/terminal/Terminal.rdef
+++ b/src/apps/terminal/Terminal.rdef
@@ -24,7 +24,7 @@ resource app_signature "application/x-vnd.obos.terminal";
    0000000E = ARGV_ONLY + BACKGROUND APP + EXCLUSIVE LAUNCH
    */
 
-resource app_flags 0x00000001;
+resource app_flags B_MULTIPLE_LAUNCH;
 
 /* BEOS:FILE_TYPES :
    "types" = "text/plain",
diff --git a/src/prefs/filetypes/FileTypes.rdef b/src/prefs/filetypes/FileTypes.rdef
index 1c3f8cf298..773a03bcc1 100644
--- a/src/prefs/filetypes/FileTypes.rdef
+++ b/src/prefs/filetypes/FileTypes.rdef
@@ -5,7 +5,7 @@
 
 resource app_signature "application/x-vnd.obos.file-types";
 
-resource app_flags 0x00000000;
+resource app_flags B_SINGLE_LAUNCH;
 
 resource file_types message {
 	"types" = "application/x-be-resource",