diff --git a/ccmain/control.cpp b/ccmain/control.cpp
index 66a2a8bb3e..2e17727730 100644
--- a/ccmain/control.cpp
+++ b/ccmain/control.cpp
@@ -1400,7 +1400,6 @@ void Tesseract::ReportXhtFixResult(bool accept_new_word, float new_x_ht,
 // Returns true if the word was changed.
 // See the comment in fixxht.cpp for a description of the overall process.
 bool Tesseract::TrainedXheightFix(WERD_RES *word, BLOCK* block, ROW *row) {
-  bool accept_new_x_ht = false;
   int original_misfits = CountMisfitTops(word);
   if (original_misfits == 0)
     return false;
diff --git a/ccmain/fixspace.cpp b/ccmain/fixspace.cpp
index e42617c053..f58c9610fa 100644
--- a/ccmain/fixspace.cpp
+++ b/ccmain/fixspace.cpp
@@ -831,7 +831,6 @@ namespace tesseract {
 inT16 Tesseract::fp_eval_word_spacing(WERD_RES_LIST &word_res_list) {
   WERD_RES_IT word_it(&word_res_list);
   WERD_RES *word;
-  inT16 word_length;
   inT16 score = 0;
   inT16 i;
   float small_limit = kBlnXHeight * fixsp_small_outlines_size;
@@ -840,7 +839,6 @@ inT16 Tesseract::fp_eval_word_spacing(WERD_RES_LIST &word_res_list) {
     word = word_it.data();
     if (word->rebuild_word == NULL)
       continue;  // Can't handle cube words.
-    word_length = word->reject_map.length();
     if (word->done ||
         word->tess_accepted ||
         word->best_choice->permuter() == SYSTEM_DAWG_PERM ||
diff --git a/cube/cube_utils.cpp b/cube/cube_utils.cpp
index c9c7d86f09..13c9c236da 100644
--- a/cube/cube_utils.cpp
+++ b/cube/cube_utils.cpp
@@ -310,7 +310,7 @@ bool CubeUtils::IsCaseInvariant(const char_32 *str32, CharSet *char_set) {
     if (first_upper)
       capitalized = true;
     prev_upper = first_upper;
-    prev_lower = islower(str32[0]);
+    prev_lower = first_lower;
     for (int c = 1; str32[c] != 0; ++c) {
       cur_upper = isupper(str32[c]);
       cur_lower = islower(str32[c]);
@@ -329,7 +329,7 @@ bool CubeUtils::IsCaseInvariant(const char_32 *str32, CharSet *char_set) {
     if (first_upper)
       capitalized = true;
     prev_upper = first_upper;
-    prev_lower = unicharset->get_islower(char_set->ClassID(str32[0]));
+    prev_lower = first_lower;
 
     for (int c = 1; c < StrLen(str32); ++c) {
       cur_upper = unicharset->get_isupper(char_set->ClassID(str32[c]));
diff --git a/viewer/svutil.cpp b/viewer/svutil.cpp
index 62677f2a14..2ac94ee80f 100644
--- a/viewer/svutil.cpp
+++ b/viewer/svutil.cpp
@@ -372,7 +372,7 @@ static int GetAddrInfo(const char* hostname, int port,
                        struct addrinfo** address) {
 #if defined(__linux__)
   char port_str[40];
-  snprintf(port_str, 40, "%ld", port);
+  snprintf(port_str, 40, "%d", port);
   return getaddrinfo(hostname, port_str, NULL, address);
 #else
   return GetAddrInfoNonLinux(hostname, port, address);