diff -up xloadimage.4.1/options.c.sub-second-delay xloadimage.4.1/options.c
--- xloadimage.4.1/options.c.sub-second-delay	2013-01-02 13:23:23.726173587 -0500
+++ xloadimage.4.1/options.c	2013-01-02 13:23:37.706185351 -0500
@@ -720,7 +720,7 @@ void processOptions(argc, argv, rglobal,
       
       continue;
 #else /* !NO_DELAY */
-      newopt->info.delay= getInteger(DELAY, argv[a]);
+      newopt->info.delay= getFloat(DELAY, argv[a]);
       break;
 #endif /* !NO_DELAY */
 
diff -up xloadimage.4.1/options.h.sub-second-delay xloadimage.4.1/options.h
--- xloadimage.4.1/options.h.sub-second-delay	2013-01-02 13:25:44.297294626 -0500
+++ xloadimage.4.1/options.h	2013-01-02 13:26:25.338329430 -0500
@@ -49,7 +49,7 @@ typedef struct option {
       unsigned int x, y, w, h; /* area of image to be used */
     } clip;
     unsigned int  colors;     /* max # of colors to use for this image */
-    unsigned int  delay;      /* # of seconds delay before auto pic advance */
+    double  delay;            /* # of seconds delay before auto pic advance */
     char         *display;    /* display name */
     struct {
       char *type; /* image type */
diff -up xloadimage.4.1/window.c.sub-second-delay xloadimage.4.1/window.c
--- xloadimage.4.1/window.c.sub-second-delay	2013-01-02 13:24:13.903216792 -0500
+++ xloadimage.4.1/window.c	2013-01-02 13:25:35.928287337 -0500
@@ -583,9 +583,9 @@ char imageInWindow(disp, scrn, image, gl
   install= (getOption(global_options, INSTALL) != NULL);
   private_cmap= (getOption(global_options, PRIVATE) != NULL);
   if ((opt= getOption(image_options, DELAY)))
-    delay= opt->info.delay;
+    delay= opt->info.delay*1000000;
   else if ((opt= getOption(global_options, DELAY)))
-    delay= opt->info.delay;
+    delay= opt->info.delay*1000000;
   else
     delay= 0;
   if ((opt= getOption(image_options, VISUAL)))
@@ -872,7 +872,10 @@ char imageInWindow(disp, scrn, image, gl
 #ifdef ENABLE_TIMEOUT
       AlarmWentOff = 0;
       signal(SIGALRM, delayAlarmHandler);
-      alarm(delay);
+      if (delay > 999999)
+	alarm(delay/1000000);
+      else
+	ualarm(delay,0);
 #endif /* ENABLE_TIMEOUT */
   }