diff --git a/ChangeLog b/ChangeLog
index 4150ab7f4..1a39305a8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,5 @@
 2010-06-23  Holger Vogt
- * configure.in, bsim3/b3ld.c, bsim3/b3set.c, bsim3/bsim3def.f,
+ * configure.in, INSTALL, bsim3/b3ld.c, bsim3/b3set.c, bsim3/bsim3def.f,
    spinit.in: Multi-core support with OpenMP for BSIM3 vers. 3.3.0
 
 2010-06-23  Robert Larice
diff --git a/INSTALL b/INSTALL
index 263a0d3a0..6570096c9 100644
--- a/INSTALL
+++ b/INSTALL
@@ -217,9 +217,13 @@ This file describes the procedures to install ngspice from sources.
 		is discouraged.
  
  --with-tcl=tcldir
-                When configured with this option the tcl module 
-                "tclspice" is compiled and installed instead of
-                plain ngspice.
+        When configured with this option the tcl module 
+        "tclspice" is compiled and installed instead of
+        plain ngspice.
+				
+ --enable-openmp 
+        Compile ngspice for multi-core processors. 
+		Parallelization is done by OpenMP 				
 
 
 1.4.2 Options Useful for Debugging Ngspice