diff --git a/src/libs/vdxf/dxflib/dl_writer_ascii.h b/src/libs/vdxf/dxflib/dl_writer_ascii.h
index 9d7084e9f..9d1f2d9b1 100644
--- a/src/libs/vdxf/dxflib/dl_writer_ascii.h
+++ b/src/libs/vdxf/dxflib/dl_writer_ascii.h
@@ -48,15 +48,17 @@
  * Implements functions defined in DL_Writer for writing low
  *   level DXF constructs to an ASCII format DXF file.
  *
- * @para fname File name of the file to be created.
- * @para version DXF version. Defaults to DL_VERSION_2002.
- *
  * @todo What if \c fname is NULL?  Or \c fname can't be opened for
  * another reason?
  */
 class DXFLIB_EXPORT DL_WriterA : public DL_Writer
 {
 public:
+    /**
+     * @brief DL_WriterA contructor
+     * @param fname File name of the file to be created.
+     * @param version DXF version. Defaults to DL_VERSION_2002.
+     */
     explicit DL_WriterA(const char* fname, DL_Codes::version version=DL_VERSION_2000)
         : DL_Writer(version), m_ofile(fname) {}
     virtual ~DL_WriterA() {}
diff --git a/src/libs/vdxf/dxflib/strlcpy.h b/src/libs/vdxf/dxflib/strlcpy.h
index f56914445..95bf9e9d1 100644
--- a/src/libs/vdxf/dxflib/strlcpy.h
+++ b/src/libs/vdxf/dxflib/strlcpy.h
@@ -62,6 +62,11 @@
 #include <sys/types.h>
 #include <string.h>
 
+#include "../vmisc/diagnostic.h"
+
+QT_WARNING_PUSH
+QT_WARNING_DISABLE_CLANG("-Wsign-conversion")
+
 /*
  * Copy src to string dst of size siz.  At most siz-1 characters
  * will be copied.  Always NUL terminates (unless siz == 0).
@@ -139,5 +144,7 @@ inline size_t strlcat(char *dst, const char *src, size_t siz)
     return(dlen + (s - src)); /* count does not include NUL */
 }
 
+QT_WARNING_POP
+
 #endif /* ! __*BSD__ */
 #endif // VALENTINA_STRLCPY_H
diff --git a/src/libs/vwidgets/fancytabbar/fancytabbar.cpp b/src/libs/vwidgets/fancytabbar/fancytabbar.cpp
index 871daaace..38927fb6d 100644
--- a/src/libs/vwidgets/fancytabbar/fancytabbar.cpp
+++ b/src/libs/vwidgets/fancytabbar/fancytabbar.cpp
@@ -162,7 +162,7 @@ QPoint FancyTabBar::GetCorner(const QRect& rect, const Corner corner) const
             break;
     }
 
-    Q_ASSERT("that's impossible!");
+    qFatal("that's impossible!");
 
     return QPoint();
 }
@@ -193,7 +193,7 @@ QRect FancyTabBar::AdjustRect(const QRect& rect, const qint8 offsetOutside, cons
             break;
     }
 
-    Q_ASSERT("that's impossible!");
+    qFatal("that's impossible!");
     return QRect();
 }
 
@@ -216,7 +216,7 @@ QPoint FancyTabBar::AdjustPoint(const QPoint& point, const qint8 offsetInsideOut
             break;
     }
 
-    Q_ASSERT("that's impossible!");
+    qFatal("that's impossible!");
     return QPoint();
 }