diff --git a/src/api/baseapi.cpp b/src/api/baseapi.cpp
index 82e3e33e..b17fe2d2 100644
--- a/src/api/baseapi.cpp
+++ b/src/api/baseapi.cpp
@@ -43,6 +43,7 @@
 #endif  // _WIN32
 
 #include <algorithm>
+#include <clocale>
 #include <fstream>
 #include <iostream>
 #include <iterator>
@@ -185,7 +186,15 @@ TessBaseAPI::TessBaseAPI()
       rect_width_(0),
       rect_height_(0),
       image_width_(0),
-      image_height_(0) {}
+      image_height_(0) {
+  const char *locale;
+  locale = std::setlocale(LC_ALL, nullptr);
+  ASSERT_HOST(!strcmp(locale, "C"));
+  locale = std::setlocale(LC_CTYPE, nullptr);
+  ASSERT_HOST(!strcmp(locale, "C"));
+  locale = std::setlocale(LC_NUMERIC, nullptr);
+  ASSERT_HOST(!strcmp(locale, "C"));
+}
 
 TessBaseAPI::~TessBaseAPI() {
   End();
diff --git a/src/ccutil/scanutils.cpp b/src/ccutil/scanutils.cpp
index f47546ae..aeb16707 100644
--- a/src/ccutil/scanutils.cpp
+++ b/src/ccutil/scanutils.cpp
@@ -472,8 +472,10 @@ static int tvfscanf(FILE* stream, const char *format, va_list ap) {
 
             case 's':               // String
             {
-              char *sp;
-              sp = sarg = va_arg(ap, char *);
+              if (!(flags & FL_SPLAT)) {
+                sarg = va_arg(ap, char *);
+              }
+              char *sp = sarg;
               while (width--) {
                 q = fgetc(stream);
                 if (isspace(static_cast<unsigned char>(q)) || q <= 0) {
@@ -488,7 +490,6 @@ static int tvfscanf(FILE* stream, const char *format, va_list ap) {
               } else if (!(flags & FL_SPLAT)) {
                 *sp = '\0'; // Terminate output
                 converted++;
-              } else {
               }
             }
             break;