diff --git a/lang/m2/libm2/CSP.mod b/lang/m2/libm2/CSP.mod
index ee723cbc..14778063 100644
--- a/lang/m2/libm2/CSP.mod
+++ b/lang/m2/libm2/CSP.mod
@@ -1,3 +1,4 @@
+(*$R-*)
 IMPLEMENTATION MODULE CSP;
 (* From 
 	"A Modula-2 Implementation of CSP",
diff --git a/lang/m2/libm2/Conversion.mod b/lang/m2/libm2/Conversion.mod
index 95215de0..1bf1f43c 100644
--- a/lang/m2/libm2/Conversion.mod
+++ b/lang/m2/libm2/Conversion.mod
@@ -1,3 +1,4 @@
+(*$R-*)
 IMPLEMENTATION MODULE Conversions;
 
   PROCEDURE ConvertNum(num, len, base: CARDINAL;
diff --git a/lang/m2/libm2/InOut.mod b/lang/m2/libm2/InOut.mod
index 1312ba4b..50b69ed5 100644
--- a/lang/m2/libm2/InOut.mod
+++ b/lang/m2/libm2/InOut.mod
@@ -1,3 +1,4 @@
+(*$R-*)
 IMPLEMENTATION MODULE InOut ;
 
   IMPORT Unix;
diff --git a/lang/m2/libm2/MathLib0.mod b/lang/m2/libm2/MathLib0.mod
index 8c43275c..9caf5b19 100644
--- a/lang/m2/libm2/MathLib0.mod
+++ b/lang/m2/libm2/MathLib0.mod
@@ -1,3 +1,4 @@
+(*$R-*)
 IMPLEMENTATION MODULE MathLib0;
 
   IMPORT Mathlib;
diff --git a/lang/m2/libm2/Mathlib.mod b/lang/m2/libm2/Mathlib.mod
index 274550df..79858a34 100644
--- a/lang/m2/libm2/Mathlib.mod
+++ b/lang/m2/libm2/Mathlib.mod
@@ -1,3 +1,4 @@
+(*$R-*)
 IMPLEMENTATION MODULE Mathlib;
 
   FROM EM IMPORT FIF, FEF;
diff --git a/lang/m2/libm2/PascalIO.mod b/lang/m2/libm2/PascalIO.mod
index c09e1d95..f97ec5d3 100644
--- a/lang/m2/libm2/PascalIO.mod
+++ b/lang/m2/libm2/PascalIO.mod
@@ -1,3 +1,4 @@
+(*$R-*)
 IMPLEMENTATION MODULE PascalIO;
 
   IMPORT Unix;
diff --git a/lang/m2/libm2/Processes.mod b/lang/m2/libm2/Processes.mod
index 23ebc8f8..2bc5d66d 100644
--- a/lang/m2/libm2/Processes.mod
+++ b/lang/m2/libm2/Processes.mod
@@ -1,3 +1,4 @@
+(*$R-*)
 IMPLEMENTATION MODULE Processes [1];
 (* This implementation module comes from
 	"Programming in Modula-2", by Niklaus Wirth,
diff --git a/lang/m2/libm2/RealConver.mod b/lang/m2/libm2/RealConver.mod
index 9c0522e7..71f26b83 100644
--- a/lang/m2/libm2/RealConver.mod
+++ b/lang/m2/libm2/RealConver.mod
@@ -1,3 +1,4 @@
+(*$R-*)
 IMPLEMENTATION MODULE RealConversions;
 
   FROM EM IMPORT FIF, FEF;
diff --git a/lang/m2/libm2/RealInOut.mod b/lang/m2/libm2/RealInOut.mod
index d45ad6f9..430678a6 100644
--- a/lang/m2/libm2/RealInOut.mod
+++ b/lang/m2/libm2/RealInOut.mod
@@ -1,3 +1,4 @@
+(*$R-*)
 IMPLEMENTATION MODULE RealInOut;
 
   IMPORT InOut;
diff --git a/lang/m2/libm2/Semaphores.mod b/lang/m2/libm2/Semaphores.mod
index 8f3bf800..96fc2482 100644
--- a/lang/m2/libm2/Semaphores.mod
+++ b/lang/m2/libm2/Semaphores.mod
@@ -1,3 +1,4 @@
+(*$R-*)
 IMPLEMENTATION MODULE Semaphores [1];
 
   FROM SYSTEM IMPORT ADDRESS, NEWPROCESS, TRANSFER;
diff --git a/lang/m2/libm2/Storage.mod b/lang/m2/libm2/Storage.mod
index b352fc2e..0779d3d0 100644
--- a/lang/m2/libm2/Storage.mod
+++ b/lang/m2/libm2/Storage.mod
@@ -1,3 +1,4 @@
+(*$R-*)
 IMPLEMENTATION MODULE Storage;
 (* This storage manager maintains an array of lists of objects with the
    same size. Commonly used sizes have their own bucket. The larger ones
diff --git a/lang/m2/libm2/Strings.mod b/lang/m2/libm2/Strings.mod
index 54179aff..5639a7f6 100644
--- a/lang/m2/libm2/Strings.mod
+++ b/lang/m2/libm2/Strings.mod
@@ -1,3 +1,4 @@
+(*$R-*)
 IMPLEMENTATION MODULE Strings;
 
 PROCEDURE Assign(source: ARRAY OF CHAR; VAR dest: ARRAY OF CHAR);
diff --git a/lang/m2/libm2/TTY.mod b/lang/m2/libm2/TTY.mod
index c330183d..f45e5e9f 100644
--- a/lang/m2/libm2/TTY.mod
+++ b/lang/m2/libm2/TTY.mod
@@ -1,4 +1,5 @@
 #
+(*$R-*)
 IMPLEMENTATION MODULE TTY;
 FROM Unix IMPORT ioctl;
 FROM SYSTEM IMPORT ADR;
diff --git a/lang/m2/libm2/Terminal.mod b/lang/m2/libm2/Terminal.mod
index d53b792b..2c905a2a 100644
--- a/lang/m2/libm2/Terminal.mod
+++ b/lang/m2/libm2/Terminal.mod
@@ -1,4 +1,5 @@
 #
+(*$R-*)
 IMPLEMENTATION MODULE Terminal;
 (* This implementation is Unix-dependant
 *)
diff --git a/lang/m2/libm2/Traps.mod b/lang/m2/libm2/Traps.mod
index 028db858..2e8f9ff2 100644
--- a/lang/m2/libm2/Traps.mod
+++ b/lang/m2/libm2/Traps.mod
@@ -1,3 +1,4 @@
+(*$R-*)
 IMPLEMENTATION MODULE Traps;
   IMPORT EM;
   IMPORT Unix;
diff --git a/lang/m2/libm2/random.mod b/lang/m2/libm2/random.mod
index 86c2a65e..ca6fb340 100644
--- a/lang/m2/libm2/random.mod
+++ b/lang/m2/libm2/random.mod
@@ -1,3 +1,4 @@
+(*$R-*)
 IMPLEMENTATION MODULE random;
 
 FROM Unix IMPORT getpid, time;