diff --git a/src/g_shared/sbarinfo.cpp b/src/g_shared/sbarinfo.cpp
index eed9d86c79..8b97c7cf3c 100644
--- a/src/g_shared/sbarinfo.cpp
+++ b/src/g_shared/sbarinfo.cpp
@@ -1352,16 +1352,16 @@ public:
 				if(script->spacingCharacter == '\0')
 					ax += font->GetSpaceWidth();
 				else
-					ax += font->GetCharWidth((int) script->spacingCharacter);
+					ax += font->GetCharWidth((unsigned char) script->spacingCharacter);
 				str++;
 				continue;
 			}
 			int width;
 			if(script->spacingCharacter == '\0') //No monospace?
-				width = font->GetCharWidth((int) *str);
+				width = font->GetCharWidth((unsigned char) *str);
 			else
-				width = font->GetCharWidth((int) script->spacingCharacter);
-			FTexture* character = font->GetChar((int) *str, &width);
+				width = font->GetCharWidth((unsigned char) script->spacingCharacter);
+			FTexture* character = font->GetChar((unsigned char) *str, &width);
 			if(character == NULL) //missing character.
 			{
 				str++;
@@ -1378,7 +1378,7 @@ public:
 
 			if(script->spacingCharacter != '\0')
 			{
-				double spacingSize = font->GetCharWidth((int) script->spacingCharacter);
+				double spacingSize = font->GetCharWidth((unsigned char) script->spacingCharacter);
 				switch(script->spacingAlignment)
 				{
 					default:
@@ -1444,7 +1444,7 @@ public:
 			if(script->spacingCharacter == '\0')
 				ax += width + spacing - (character->LeftOffset+1);
 			else //width gets changed at the call to GetChar()
-				ax += font->GetCharWidth((int) script->spacingCharacter) + spacing;
+				ax += font->GetCharWidth((unsigned char) script->spacingCharacter) + spacing;
 			str++;
 		}
 	}
diff --git a/src/g_shared/sbarinfo_commands.cpp b/src/g_shared/sbarinfo_commands.cpp
index e66d23f79e..3536bfa5e7 100644
--- a/src/g_shared/sbarinfo_commands.cpp
+++ b/src/g_shared/sbarinfo_commands.cpp
@@ -745,13 +745,13 @@ class CommandDrawString : public SBarInfoCommand
 				if(script->spacingCharacter == '\0')
 					x -= static_cast<int> (font->StringWidth(str)+(spacing * str.Len()));
 				else //monospaced, so just multiplay the character size
-					x -= static_cast<int> ((font->GetCharWidth((int) script->spacingCharacter) + spacing) * str.Len());
+					x -= static_cast<int> ((font->GetCharWidth((unsigned char) script->spacingCharacter) + spacing) * str.Len());
 				break;
 			case ALIGN_CENTER:
 				if(script->spacingCharacter == '\0')
 					x -= static_cast<int> (font->StringWidth(str)+(spacing * str.Len()) / 2);
 				else
-					x -= static_cast<int> ((font->GetCharWidth((int) script->spacingCharacter) + spacing) * str.Len() / 2);
+					x -= static_cast<int> ((font->GetCharWidth((unsigned char) script->spacingCharacter) + spacing) * str.Len() / 2);
 				break;
 			}
 		}