diff --git a/configure.ac b/configure.ac
index 2d8dfb6d..76c349db 100644
--- a/configure.ac
+++ b/configure.ac
@@ -7,6 +7,7 @@ AC_CONFIG_HEADERS([include/config.h])
 AC_CONFIG_SRCDIR([configure.ac])
 AC_CONFIG_AUX_DIR([config])
 AM_INIT_AUTOMAKE([1.9])
+AC_DEFINE([_POSIX_C_SOURCE],[200809L],[Enable POSIX])
 PACKAGE_SUFFIX="-2.0"
 AC_SUBST(PACKAGE_SUFFIX)
 dnl https://www.gnu.org/software/libtool/manual/libtool.html#Libtool-versioning
diff --git a/index/zebraapi.c b/index/zebraapi.c
index 38f197f5..70125a1a 100644
--- a/index/zebraapi.c
+++ b/index/zebraapi.c
@@ -873,7 +873,7 @@ void map_basenames_func(void *vp, const char *name, const char *value)
         return ;
     no--;
     for (i = 0; i<p->num_bases; i++)
-        if (p->basenames[i] && !STRCASECMP(p->basenames[i], fromdb))
+        if (p->basenames[i] && !yaz_strcasecmp(p->basenames[i], fromdb))
         {
             p->basenames[i] = 0;
             for (i = 0; i < no; i++)
diff --git a/index/zinfo.c b/index/zinfo.c
index d0630001..86ec44bd 100644
--- a/index/zinfo.c
+++ b/index/zinfo.c
@@ -799,11 +799,11 @@ int zebraExplain_curDatabase(ZebraExplainInfo zei, const char *database)
 
     assert(zei);
     if (zei->curDatabaseInfo &&
-        !STRCASECMP(zei->curDatabaseInfo->databaseName, database))
+        !yaz_strcasecmp(zei->curDatabaseInfo->databaseName, database))
         return 0;
     for (zdi = zei->databaseInfo; zdi; zdi=zdi->next)
     {
-        if (!STRCASECMP(zdi->databaseName, database_n))
+        if (!yaz_strcasecmp(zdi->databaseName, database_n))
             break;
     }
     if (!zdi)
@@ -897,7 +897,7 @@ int zebraExplain_newDatabase(ZebraExplainInfo zei, const char *database,
     assert(zei);
     for (zdi = zei->databaseInfo; zdi; zdi=zdi->next)
     {
-        if (!STRCASECMP(zdi->databaseName, database_n))
+        if (!yaz_strcasecmp(zdi->databaseName, database_n))
             break;
     }
     if (zdi)
diff --git a/index/zinfo.h b/index/zinfo.h
index 38c59205..12f7c445 100644
--- a/index/zinfo.h
+++ b/index/zinfo.h
@@ -25,13 +25,6 @@ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 #include <idzebra/api.h>
 #include "recindex.h"
 
-/* Compare string (ignore case) */
-#ifdef WIN32
-#define STRCASECMP      stricmp
-#else
-#define STRCASECMP      strcasecmp
-#endif
-
 YAZ_BEGIN_CDECL
 
 typedef enum {