diff --git a/src/libCom/post.h b/src/libCom/post.h
index c3af21a99..47671aa32 100644
--- a/src/libCom/post.h
+++ b/src/libCom/post.h
@@ -33,6 +33,7 @@
  * .04  03-03-92        jba     added MAX, MIN, and comma
  * .05  03-06-92        jba     added multiple conditional expressions ?
  * .06  04-02-92        jba     added CONSTANT for floating pt constants in expression
+ * .07  05-11-94        jba     added CONST_PI, CONST_D2R, and CONST_R2D
 
  */
 
@@ -109,4 +110,7 @@
 #define		COND_IF		69
 #define		COND_END	70
 #define		CONSTANT	71
+#define		CONST_PI	72
+#define		CONST_D2R	73
+#define		CONST_R2D	74
 #define		END_STACK	-1