diff --git a/epplets/esdcloak.c b/epplets/esdcloak.c
index 106e662..8ddf69e 100644
--- a/epplets/esdcloak.c
+++ b/epplets/esdcloak.c
@@ -463,9 +463,9 @@ draw_ball(void)
      {
 	ball_x = rand() % 39;
 	ball_y = rand() % 39;
-	while (abs(d_x) < 0.5)
+	while (fabs(d_x) < 0.5)
 	   d_x = ((double)rand() / RAND_MAX * 4) - 2.0;
-	while (abs(d_y) < 0.5)
+	while (fabs(d_y) < 0.5)
 	   d_y = ((double)rand() / RAND_MAX * 4) - 2.0;
 	blank_buf();
 	setup = 1;
@@ -623,7 +623,7 @@ aa_line(int x1, int y1, int x2, int y2, unsigned char b,
    line_width = (x2 - x1);
    line_height = (y2 - y1);
 
-   if (abs(line_width) > abs(line_height))
+   if (fabs(line_width) > fabs(line_height))
      {
 	if (x1 > x2)
 	  {
@@ -639,7 +639,7 @@ aa_line(int x1, int y1, int x2, int y2, unsigned char b,
 
 	/* This is currently broken. It is supposed to account
 	 * for lines that don't span more than one pixel */
-	if (abs(line_width) < 0.1)
+	if (fabs(line_width) < 0.1)
 	  {
 	     x2 = x1 + 0.5;
 	     x1 -= 0.5;
@@ -727,7 +727,7 @@ aa_line(int x1, int y1, int x2, int y2, unsigned char b,
 	  }
 
 	/* This is currently broken */
-	if (abs(line_height) < 0.1)
+	if (fabs(line_height) < 0.1)
 	  {
 	     y2 = y1 + 0.5;
 	     y1 -= 0.5;