diff --git a/src/button.cpp b/src/button.cpp
index 02cd300..2b44179 100644
--- a/src/button.cpp
+++ b/src/button.cpp
@@ -24,6 +24,10 @@ CButton::CButton()
     m_selMenu         = 0;
     m_bMouseDown      = false;
     m_message         = static_cast<Uint32> (-1);
+    m_pPixmap         = nullptr;
+    m_pDecor          = nullptr;
+    m_pSound          = nullptr;
+    m_toolTips        = nullptr;
 }
 
 CButton::~CButton () {}
diff --git a/src/event.cpp b/src/event.cpp
index 47cdca1..92232e1 100644
--- a/src/event.cpp
+++ b/src/event.cpp
@@ -1494,6 +1494,19 @@ CEvent::CEvent()
     m_demoTime      = 0;
     m_keymod        = 0;
     m_posHelpButton = {-1, -1};
+    m_pPixmap       = nullptr;
+    m_pDecor        = nullptr;
+    m_pSound        = nullptr;
+    m_pMovie        = nullptr;
+    m_bMenu         = false;
+    m_bHili         = false;
+    m_demoIndex     = 0;
+    m_demoEnd       = 0;
+    m_bHiliInfoButton = false;
+    m_bHiliHelpButton = false;
+
+    memset (m_textToolTips, 0, sizeof (m_textToolTips));
+    memset (m_libelle, 0, sizeof (m_libelle));
 
     for (i = 0 ; i < MAXBUTTON ; i++)
         m_lastFloor[i] = 0;
@@ -5290,4 +5303,3 @@ void CEvent::PushUserEvent (Sint32 code)
     SDL_PushEvent (&event);
 
 }
-
diff --git a/src/jauge.cpp b/src/jauge.cpp
index 12f0c4c..109d879 100644
--- a/src/jauge.cpp
+++ b/src/jauge.cpp
@@ -11,8 +11,11 @@
 
 CJauge::CJauge()
 {
-    m_type            = 0;
-    m_bHide           = true;
+    m_type    = 0;
+    m_bHide   = true;
+    m_pPixmap = nullptr;
+    m_pDecor  = nullptr;
+    m_pSound  = nullptr;
 }
 
 CJauge::~CJauge()
@@ -105,4 +108,3 @@ POINT CJauge::GetPos()
 {
     return m_pos;
 }
-
diff --git a/src/menu.cpp b/src/menu.cpp
index 75dc570..b23c95e 100644
--- a/src/menu.cpp
+++ b/src/menu.cpp
@@ -127,7 +127,10 @@ static const char *GetErr (Sint32 rank)
 CMenu::CMenu()
 {
     m_nbButtons = 0;
-    m_selRank = -1;
+    m_selRank   = -1;
+    m_pPixmap   = nullptr;
+    m_pDecor    = nullptr;
+    m_pSound    = nullptr;
 }
 
 // Destructeur.
@@ -503,5 +506,3 @@ void CMenu::Message()
     if (m_selRank != -1)
         CEvent::PushUserEvent (WM_BUTTON0 + m_selRank);
 }
-
-
diff --git a/src/movie.cpp b/src/movie.cpp
index 1b0871d..7889a0d 100644
--- a/src/movie.cpp
+++ b/src/movie.cpp
@@ -145,6 +145,8 @@ CMovie::CMovie()
     m_videoTex = nullptr;
     pinfo      = nullptr;
 
+    memset (m_audiobuf, 0, sizeof (m_audiobuf));
+
     m_ret = 0;
 }
 
diff --git a/src/pixmap.cpp b/src/pixmap.cpp
index 28c1835..0fd6dfc 100644
--- a/src/pixmap.cpp
+++ b/src/pixmap.cpp
@@ -36,6 +36,10 @@ CPixmap::CPixmap()
     m_mouseSprite  = SPRITE_WAIT;
     m_bBackDisplayed = false;
 
+    m_lpSDLBlupi = nullptr;
+
+    memset (m_filename, 0, sizeof (m_filename));
+
     for (i = 0; i < MAXCURSORS; i++)
         m_lpSDLCursors[i] = nullptr;