diff --git a/cde/programs/dtstyle/Backdrop.c b/cde/programs/dtstyle/Backdrop.c
index bd738be10..f09fc22b8 100644
--- a/cde/programs/dtstyle/Backdrop.c
+++ b/cde/programs/dtstyle/Backdrop.c
@@ -258,7 +258,7 @@ free_dirList(char ** dirList,
  *  SelectCurrentBackdrop() - Selects current backdrop in list
  *
  ************************************************************************/
-void SelectCurrentBackdrop(callback)
+void SelectCurrentBackdrop(int callback)
 {
     DtWsmWorkspaceInfo   *wInfo=NULL;
     Atom	     aWS;
diff --git a/cde/programs/dtstyle/Dtwm.c b/cde/programs/dtstyle/Dtwm.c
index a74b493ac..89aabd507 100644
--- a/cde/programs/dtstyle/Dtwm.c
+++ b/cde/programs/dtstyle/Dtwm.c
@@ -196,7 +196,7 @@ popup_dtwmBB(
 /*+++++++++++++++++++++++++++++++++++++++*/
 
 static void 
-getDtwmValues( )
+getDtwmValues(void)
 {
     char *str_type_return;
     XrmValue value_return;
diff --git a/cde/programs/dtstyle/Help.c b/cde/programs/dtstyle/Help.c
index fe3eea933..c57eac3aa 100644
--- a/cde/programs/dtstyle/Help.c
+++ b/cde/programs/dtstyle/Help.c
@@ -54,7 +54,7 @@
 #include "Help.h"
 
 static Widget
-GetHelpDialog( )
+GetHelpDialog(void)
 {
     static HelpStruct       *pHelpCache;
 
diff --git a/cde/programs/dtstyle/Main.c b/cde/programs/dtstyle/Main.c
index 5bc71f37f..3c7e933cd 100644
--- a/cde/programs/dtstyle/Main.c
+++ b/cde/programs/dtstyle/Main.c
@@ -646,9 +646,7 @@ ErrorHandler(
  *
  ************************************************************************/
 static int
-IOErrorHandler (display)
- Display *display;
-
+IOErrorHandler (Display *display)
 {
 #ifdef DEBUG
     Warning ("X IO error occurred during generic operation");