diff --git a/programs/testSDL.c b/programs/testSDL.c
index beec8d2..ed34068 100644
--- a/programs/testSDL.c
+++ b/programs/testSDL.c
@@ -526,13 +526,13 @@ RCL_Unit textureAt(int16_t x, int16_t y)
 RCL_Unit floorHeightAt(int16_t x, int16_t y)
 {
   if (x == 6 && (y == 13 || y == 14)) // moving lift
-    return ((RCL_absVal(-1 * (frame % 64) + 32)) * RCL_UNITS_PER_SQUARE) / 8; 
+    return ((RCL_abs(-1 * (frame % 64) + 32)) * RCL_UNITS_PER_SQUARE) / 8; 
 
   if (x >= 0 && x < LEVEL_X_RES && y >= 0 && y < LEVEL_Y_RES)
     return (levelFloor[(LEVEL_Y_RES - y -1) * LEVEL_X_RES + x] * RCL_UNITS_PER_SQUARE) / 8; 
 
-  int a = RCL_absVal(x - LEVEL_X_RES / 2) - LEVEL_X_RES / 2;
-  int b = RCL_absVal(y - LEVEL_Y_RES / 2) - LEVEL_Y_RES / 2;
+  int a = RCL_abs(x - LEVEL_X_RES / 2) - LEVEL_X_RES / 2;
+  int b = RCL_abs(y - LEVEL_Y_RES / 2) - LEVEL_Y_RES / 2;
 
   return (a > b ? a : b) * RCL_UNITS_PER_SQUARE;
 }
diff --git a/raycastlib.h b/raycastlib.h
index 4c32116..107b263 100644
--- a/raycastlib.h
+++ b/raycastlib.h
@@ -26,7 +26,11 @@
 
   author: Miloslav "drummyfish" Ciz
   license: CC0 1.0
-  version: 0.908
+  version: 0.908d
+
+  Version numbering: major.minor[d], id 'd' is appended, this is a
+  in-development version based on the previous stable major.minor version. Two
+  'd' versions with the same version number, .e.g. 1.0d, may be different.
 */
 
 #include <stdint.h>