diff --git a/configure b/configure
index 4199e72179..62dae3abaa 100755
--- a/configure
+++ b/configure
@@ -12769,13 +12769,11 @@ _ACEOF
 cat confdefs.h >>conftest.$ac_ext
 cat >>conftest.$ac_ext <<_ACEOF
 /* end confdefs.h.  */
-#include <sys/types.h> /* for off_t */
-     #include <stdio.h>
+#include <stdio.h>
 int
 main ()
 {
-int (*fp) (FILE *, off_t, int) = fseeko;
-     return fseeko (stdin, 0, 0) && fp (stdin, 0, 0);
+return fseeko (stdin, 0, 0) && (fseeko) (stdin, 0, 0);
   ;
   return 0;
 }
@@ -12815,13 +12813,11 @@ cat confdefs.h >>conftest.$ac_ext
 cat >>conftest.$ac_ext <<_ACEOF
 /* end confdefs.h.  */
 #define _LARGEFILE_SOURCE 1
-#include <sys/types.h> /* for off_t */
-     #include <stdio.h>
+#include <stdio.h>
 int
 main ()
 {
-int (*fp) (FILE *, off_t, int) = fseeko;
-     return fseeko (stdin, 0, 0) && fp (stdin, 0, 0);
+return fseeko (stdin, 0, 0) && (fseeko) (stdin, 0, 0);
   ;
   return 0;
 }
@@ -43682,9 +43678,19 @@ fi
 
 if test "${PBX_FREETDS}" != "0";
 then
-    case `grep TDS_VERSION_NO ${FREETDS_DIR:-/usr}/include/tdsver.h` in
-	*0.64*)
-		FREETDS_INCLUDE="${FREETDS_INCLUDE} -DFREETDS_0_64"
+    if test "${FREETDS_DIR}x" = "x";
+    then
+        for tds_dir in /usr /usr/local;
+        do
+            if test -f "${tds_dir}/include/tdsver.h";
+            then
+                FREETDS_DIR="${tds_dir}"
+            fi
+        done
+    fi
+    case `${GREP} TDS_VERSION_NO ${FREETDS_DIR:-/usr}/include/tdsver.h` in
+    *0.64*)
+        FREETDS_INCLUDE="${FREETDS_INCLUDE} -DFREETDS_0_64"
 	;;
     *0.63*)
         FREETDS_INCLUDE="${FREETDS_INCLUDE} -DFREETDS_0_63"
diff --git a/configure.ac b/configure.ac
index 498bf69830..b225f0ab83 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1336,9 +1336,19 @@ AST_EXT_TOOL_CHECK([GMIME], [gmime])
 AST_EXT_LIB_CHECK([FREETDS], [tds], [tds_version], [tds.h])
 if test "${PBX_FREETDS}" != "0";
 then
-    case `grep TDS_VERSION_NO ${FREETDS_DIR:-/usr}/include/tdsver.h` in
-	*0.64*)
-		FREETDS_INCLUDE="${FREETDS_INCLUDE} -DFREETDS_0_64"
+    if test "${FREETDS_DIR}x" = "x";
+    then
+        for tds_dir in /usr /usr/local;
+        do
+            if test -f "${tds_dir}/include/tdsver.h";
+            then
+                FREETDS_DIR="${tds_dir}"
+            fi
+        done
+    fi
+    case `${GREP} TDS_VERSION_NO ${FREETDS_DIR:-/usr}/include/tdsver.h` in
+    *0.64*)
+        FREETDS_INCLUDE="${FREETDS_INCLUDE} -DFREETDS_0_64"
 	;;
     *0.63*)
         FREETDS_INCLUDE="${FREETDS_INCLUDE} -DFREETDS_0_63"