diff --git a/Makefile.win b/Makefile.win
new file mode 100644
index 0000000..e28db0a
--- /dev/null
+++ b/Makefile.win
@@ -0,0 +1,40 @@
+###########################################################################
+#
+# Usage:   NMAKE -f Makefile.win APR={apr installion dir} APRUTIL={aprutil installion dir}
+#
+!IF "$(APR)" == "" || "$(APRUTIL)" == ""
+!ERROR NMAKE arguments: APR=dir and APRUTIL=dir are required to build modsec-sdbm-util for Windows
+!ENDIF
+
+###########################################################################
+
+cc = cl
+
+link = link
+
+includes = -I$(APRUTIL)\include -I$(APR)\include
+
+libs = $(APR)\lib\libapr-1.lib $(APRUTIL)\lib\libaprutil-1.lib
+
+cflags= $(includes) /nologo /DWIN32 /DWINNT /D_WINDOWS /Dinline=APR_INLINE /w /Zf /Zi /FS /O2 /GL /MD /DNDEBUG
+
+ldflags = /nologo /Incremental:no /LTCG /debug /opt:ref,icf 
+
+objs = modsec-sdbm-util.obj
+
+exe = modsec-sdbm-util.exe
+
+###########################################################################
+
+all: $(exe)
+
+exe: $(exe)
+
+.c.obj:
+        $(cc) $(cflags) -c $< -Fo$@
+
+$(exe): $(objs)
+        $(link) $(ldflags) -out:$(exe) $(objs) $(libs)
+
+clean:
+        del $(objs) $(exe) *.exe *.pdb *.idb *.ilk *.exp *.res *.rc *.bin *.manifest
diff --git a/modsec-sdbm-util.c b/modsec-sdbm-util.c
index 420a493..250e638 100644
--- a/modsec-sdbm-util.c
+++ b/modsec-sdbm-util.c
@@ -20,7 +20,7 @@
 #include <ctype.h>
 #include <stdio.h>
 #include <stdlib.h>
-#include <unistd.h>
+
 #include <apr.h>
 #include <apr_errno.h>
 #include <apr_general.h>
@@ -32,11 +32,86 @@
 #define VERSION "v1.0"
 
 #ifndef WIN32
+#include <unistd.h>
 # define v(fmt, ARGS...) do { if (verbose) printf("%s:%d:%s(): " fmt, __FILE__, \
         __LINE__, __func__, ## ARGS); } while (0)
 # define p(fmt, ARGS...) do { printf(fmt, ## ARGS); } while (0)
 #endif
 #ifdef WIN32
+#include <windows.h>
+#include <string.h>
+
+int     opterr = 1,             /* if error message should be printed */
+  optind = 1,             /* index into parent argv vector */
+  optopt,                 /* character checked for validity */
+  optreset;               /* reset getopt */
+char    *optarg;                /* argument associated with option */
+
+#define BADCH   (int)'?'
+#define BADARG  (int)':'
+#define EMSG    ""
+
+/*
+* getopt --
+*      Parse argc/argv argument vector.
+*/
+int
+  getopt(int nargc, char * const nargv[], const char *ostr)
+{
+  static char *place = EMSG;              /* option letter processing */
+  const char *oli;                        /* option letter list index */
+
+  if (optreset || !*place) {              /* update scanning pointer */
+    optreset = 0;
+    if (optind >= nargc || *(place = nargv[optind]) != '-') {
+      place = EMSG;
+      return (-1);
+    }
+    if (place[1] && *++place == '-') {      /* found "--" */
+      ++optind;
+      place = EMSG;
+      return (-1);
+    }
+  }                                       /* option letter okay? */
+  if ((optopt = (int)*place++) == (int)':' ||
+    !(oli = strchr(ostr, optopt))) {
+      /*
+      * if the user didn't specify '-' as an option,
+      * assume it means -1.
+      */
+      if (optopt == (int)'-')
+        return (-1);
+      if (!*place)
+        ++optind;
+      if (opterr && *ostr != ':')
+        (void)printf("illegal option -- %c\n", optopt);
+      return (BADCH);
+  }
+  if (*++oli != ':') {                    /* don't need argument */
+    optarg = NULL;
+    if (!*place)
+      ++optind;
+  }
+  else {                                  /* need an argument */
+    if (*place)                     /* no white space */
+      optarg = place;
+    else if (nargc <= ++optind) {   /* no arg */
+      place = EMSG;
+      if (*ostr == ':')
+        return (BADARG);
+      if (opterr)
+        (void)printf("option requires an argument -- %c\n", optopt);
+      return (BADCH);
+    }
+    else                            /* white space */
+      optarg = nargv[optind];
+    place = EMSG;
+    ++optind;
+  }
+  return (optopt);                        /* dump back option letter */
+}
+
+#define strndup strdup
 #define p  printf
 #define v  if (verbose) printf
 #endif