diff --git a/chalk/core/kis_exif_value.cc b/chalk/core/kis_exif_value.cc
index 1981bd02b..134d4009a 100644
--- a/chalk/core/kis_exif_value.cc
+++ b/chalk/core/kis_exif_value.cc
@@ -667,8 +667,11 @@ TQString ExifValue::toString(uint i)
             return TQString("%1 ").arg( asExifNumber( i ).m_long );
         case EXIF_TYPE_RATIONAL:
             return TQString("%1 / %2 ").arg( asExifNumber( i ).m_rational.numerator ).arg( asExifNumber( i ).m_rational.denominator );
-        case EXIF_TYPE_SBYTE:
-            return TQString("%1 ").arg( asExifNumber( i ).m_sbyte );
+        case EXIF_TYPE_SBYTE: {
+            /* workaround to compiler bug on Raspbian Wheezy */
+            TQ_INT8 o_sbyte = asExifNumber( i ).m_sbyte;
+            return TQString("%1 ").arg( o_sbyte );
+        }
         case EXIF_TYPE_SSHORT:
             return TQString("%1 ").arg( asExifNumber( i ).m_sshort );
         case EXIF_TYPE_SLONG: