8 files changed, 13 insertions, 11 deletions
diff --git a/src/gui/palette.cpp b/src/gui/palette.cpp
index 94604c128..558a977b5 100644
--- a/src/gui/palette.cpp
+++ b/src/gui/palette.cpp
@@ -64,7 +64,7 @@ Palette::~Palette()
     mInstances.erase(this);
 }
 
-const gcn::Color& Palette::getColor(const char c, bool &valid)
+const gcn::Color& Palette::getColor(const signed char c, bool &valid)
 {
     const CharColors::const_iterator it = mCharColors.find(c);
     if (it != mCharColors.end())
diff --git a/src/gui/palette.h b/src/gui/palette.h
index 8fae00d6a..ed9b14e22 100644
--- a/src/gui/palette.h
+++ b/src/gui/palette.h
@@ -67,7 +67,7 @@ class Palette
          *
          * @return the requested color or Palette::BLACK
          */
-        const gcn::Color &getColor(const char c, bool &valid);
+        const gcn::Color &getColor(const signed char c, bool &valid);
 
         /**
          * Gets the color associated with the type. Sets the alpha channel
@@ -180,7 +180,7 @@ class Palette
             gcn::Color testColor;
             gcn::Color committedColor;
             std::string text;
-            char ch;
+            signed char ch;
             GradientType grad;
             GradientType committedGrad;
             int gradientIndex;
diff --git a/src/gui/theme.cpp b/src/gui/theme.cpp
index 61b45232b..d13f04656 100644
--- a/src/gui/theme.cpp
+++ b/src/gui/theme.cpp
@@ -810,7 +810,7 @@ static gcn::Color readColor(const std::string &description)
     int v = 0;
     for (int i = 1; i < 7; ++i)
     {
-        const char c = description[i];
+        signed const char c = description[i];
         int n;
 
         if ('0' <= c && c <= '9')
diff --git a/src/gui/theme.h b/src/gui/theme.h
index 651bcb9bc..92ff6073b 100644
--- a/src/gui/theme.h
+++ b/src/gui/theme.h
@@ -284,7 +284,8 @@ class Theme final : public Palette, public ConfigListener
                                                       const int alpha = 255)
         { return mInstance->getColor(type, alpha); }
 
-        static const gcn::Color &getThemeColor(const char c, bool &valid)
+        static const gcn::Color &getThemeColor(const signed char c,
+                                               bool &valid)
         { return mInstance->getColor(c, valid); }
 
         static gcn::Color getProgressColor(const int type,
diff --git a/src/gui/userpalette.cpp b/src/gui/userpalette.cpp
index cb4aa3587..91530a451 100644
--- a/src/gui/userpalette.cpp
+++ b/src/gui/userpalette.cpp
@@ -93,7 +93,7 @@ std::string UserPalette::getConfigName(const std::string &typeName)
         }
         else
         {
-           res[pos] = static_cast<char>(tolower(typeName[i]));
+           res[pos] = static_cast<signed char>(tolower(typeName[i]));
         }
         pos ++;
     }
diff --git a/src/gui/whoisonline.cpp b/src/gui/whoisonline.cpp
index 68ea0f67b..d71b595fe 100644
--- a/src/gui/whoisonline.cpp
+++ b/src/gui/whoisonline.cpp
@@ -411,7 +411,8 @@ void WhoIsOnline::loadWebList()
                     level = 0;
 
                 OnlinePlayer *player = new OnlinePlayer(nick,
-                    static_cast<char>(255), level, GENDER_UNSPECIFIED, -1);
+                    static_cast<signed char>(255), level,
+                    GENDER_UNSPECIFIED, -1);
                 mOnlinePlayers.insert(player);
                 mOnlineNicks.insert(nick);
 
@@ -477,7 +478,7 @@ size_t WhoIsOnline::memoryWrite(void *ptr, size_t size,
     WhoIsOnline *wio = reinterpret_cast<WhoIsOnline *>(stream);
     const size_t totalMem = size * nmemb;
     wio->mMemoryBuffer = static_cast<char*>(realloc(wio->mMemoryBuffer,
-                                            wio->mDownloadedBytes + totalMem));
+        wio->mDownloadedBytes + totalMem));
     if (wio->mMemoryBuffer)
     {
         memcpy(&(wio->mMemoryBuffer[wio->mDownloadedBytes]), ptr, totalMem);
diff --git a/src/gui/widgets/browserbox.cpp b/src/gui/widgets/browserbox.cpp
index cac2a53f2..e338ab009 100644
--- a/src/gui/widgets/browserbox.cpp
+++ b/src/gui/widgets/browserbox.cpp
@@ -421,7 +421,7 @@ int BrowserBox::calcHeight()
 
     const int fontHeight = font->getHeight();
     const int fontWidthMinus = font->getWidth("-");
-    char const *const hyphen = "~";
+    const char *const hyphen = "~";
     const int hyphenWidth = font->getWidth(hyphen);
 
     gcn::Color selColor = mForegroundColor;
@@ -495,7 +495,7 @@ int BrowserBox::calcHeight()
                 // Check for color change in format "##x", x = [L,P,0..9]
                 if (row.find("##", start) == start && row.size() > start + 2)
                 {
-                    const char c = row.at(start + 2);
+                    const signed char c = row.at(start + 2);
 
                     bool valid;
                     const gcn::Color col = Theme::getThemeColor(c, valid);
diff --git a/src/gui/widgets/textbox.cpp b/src/gui/widgets/textbox.cpp
index 8af080294..cbefa4006 100644
--- a/src/gui/widgets/textbox.cpp
+++ b/src/gui/widgets/textbox.cpp
@@ -327,7 +327,7 @@ void TextBox::keyPressed(gcn::KeyEvent& keyEvent)
             if (key.isCharacter() && mEditable)
             {
                 mTextRows[mCaretRow].insert(mCaretColumn,
-                    std::string(1, static_cast<char>(key.getValue())));
+                    std::string(1, static_cast<signed char>(key.getValue())));
                 ++ mCaretColumn;
             }
             break;