diff --git a/sys_linux.c b/sys_linux.c
index 7c3458e..a33a725 100644
--- a/sys_linux.c
+++ b/sys_linux.c
@@ -106,8 +106,7 @@ static int version_patchlevel;
 /* Flag indicating whether adjtimex() returns the remaining time adjustment
 or not.  If not we have to read the outstanding adjustment by setting it to
 zero, examining the return value and setting the outstanding adjustment back
-again.  If 1, txc.modes equal to zero is used to read the time.  If 2,
-txc.modes is set to ADJ_OFFSET_SS_READ. */
+again. */
 
 static int have_readonly_adjtime;
 
@@ -766,29 +765,19 @@ get_offset_correction(struct timeval *raw,
   if (!slow_slewing) {
     offset = 0;
   } else {
-    switch (have_readonly_adjtime) {
-      case 2:
-        if (TMX_GetOffsetLeft(&offset) < 0) {
-          LOG_FATAL(LOGF_SysLinux, "adjtimex() failed");
-        }
-        break;
-      case 0:
-        toffset = 0;
-        if (TMX_ApplyOffset(&toffset) < 0) {
-          LOG_FATAL(LOGF_SysLinux, "adjtimex() failed");
-        }
-        offset = toffset;
-        if (TMX_ApplyOffset(&toffset) < 0) {
-          LOG_FATAL(LOGF_SysLinux, "adjtimex() failed");
-        }
-        break;
-      case 1:
-        if (TMX_GetOffsetLeftOld(&offset) < 0) {
-          LOG_FATAL(LOGF_SysLinux, "adjtimex() failed");
-        }
-        break;
-      default:
-        assert(0);
+    if (have_readonly_adjtime) {
+      if (TMX_GetOffsetLeft(&offset) < 0) {
+        LOG_FATAL(LOGF_SysLinux, "adjtimex() failed");
+      }
+    } else {
+      toffset = 0;
+      if (TMX_ApplyOffset(&toffset) < 0) {
+        LOG_FATAL(LOGF_SysLinux, "adjtimex() failed");
+      }
+      offset = toffset;
+      if (TMX_ApplyOffset(&toffset) < 0) {
+        LOG_FATAL(LOGF_SysLinux, "adjtimex() failed");
+      }
     }
 
     if (offset == 0) {
@@ -1006,7 +995,7 @@ get_version_specific_details(void)
   if (kernelvercmp(major, minor, patch, 2, 6, 27) < 0) {
     have_readonly_adjtime = 0;
   } else {
-    have_readonly_adjtime = 2;
+    have_readonly_adjtime = 1;
   }
 
   /* ADJ_NANO support */
@@ -1051,7 +1040,7 @@ SYS_Linux_Initialise(void)
     LOG_FATAL(LOGF_SysLinux, "adjtimex() failed");
   }
 
-  if (have_readonly_adjtime == 2 && (TMX_GetOffsetLeft(&offset) < 0 || offset)) {
+  if (have_readonly_adjtime && (TMX_GetOffsetLeft(&offset) < 0 || offset)) {
     LOG(LOGS_INFO, LOGF_SysLinux, "adjtimex() doesn't support ADJ_OFFSET_SS_READ");
     have_readonly_adjtime = 0;
   }
diff --git a/wrap_adjtimex.c b/wrap_adjtimex.c
index 34e8251..bcb9870 100644
--- a/wrap_adjtimex.c
+++ b/wrap_adjtimex.c
@@ -96,17 +96,6 @@ TMX_GetFrequency(double *freq)
   return result;
 }
 
-int
-TMX_GetOffsetLeftOld(long *offset)
-{
-  struct timex txc;
-  int result;
-  txc.modes = 0; /* pure read */
-  result = adjtimex(&txc);
-  *offset = txc.offset;
-  return result;
-}
-
 int
 TMX_GetOffsetLeft(long *offset)
 {
diff --git a/wrap_adjtimex.h b/wrap_adjtimex.h
index 166315e..6438799 100644
--- a/wrap_adjtimex.h
+++ b/wrap_adjtimex.h
@@ -68,7 +68,6 @@ int TMX_SetTick(long tick);
 int TMX_ApplyOffset(long *offset);
 int TMX_SetFrequency(double *freq, long tick);
 int TMX_GetFrequency(double *freq);
-int TMX_GetOffsetLeftOld(long *offset);
 int TMX_GetOffsetLeft(long *offset);
 int TMX_ReadCurrentParams(struct tmx_params *params);
 int TMX_SetLeap(int leap);