diff --git a/Changes b/Changes
index e4a62bfcd..b5732acdf 100644
--- a/Changes
+++ b/Changes
@@ -3,6 +3,10 @@ Revision history for Verilator
 The contributors that suggested a given feature are shown in [].  [by ...]
 indicates the contributor was also the author of the fix; Thanks!
 
+* Verilator 3.658 2008/02/25
+
+**** Fix unistd compile error in 3.657.  [Patricio Kaplan, Jonathan Kimmitt]
+
 * Verilator 3.657 2008/02/20
 
 **** Fix assignments of {a,b,c} = {c,b,a}.  [Jonathan Kimmitt]
diff --git a/src/V3Options.cpp b/src/V3Options.cpp
index 5d3adb869..4aff65ae6 100644
--- a/src/V3Options.cpp
+++ b/src/V3Options.cpp
@@ -24,6 +24,7 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <dirent.h>
+#include <unistd.h>
 #include <set>
 #include <list>
 #include <map>
diff --git a/src/config_build.h.in b/src/config_build.h.in
index 8fbef9c0d..e14831cba 100644
--- a/src/config_build.h.in
+++ b/src/config_build.h.in
@@ -24,7 +24,7 @@
 //**********************************************************************
 //**** Version and host name
 
-#define DTVERSION	"Verilator 3.657 2008/01/18"
+#define DTVERSION	"Verilator 3.658 2008/01/18"
 
 //**********************************************************************
 //**** Functions