diff --git a/src/sprite.cc b/src/sprite.cc
index 0b0c7cd..7af9ac0 100644
--- a/src/sprite.cc
+++ b/src/sprite.cc
@@ -351,7 +351,7 @@ bool Sprite::Load(unsigned char *Buf,long &P)
     // Fabrique la surface
     Image[i]=SDL_CreateRGBSurface((Dim[i].bpp-3)*SDL_SRCALPHA,Dim[i].L,Dim[i].H,Dim[i].bpp*8,
 				  0xff,0xff00,0xff0000,0xff000000*(Dim[i].bpp-3));
-    if(Image[i]<=NULL) {
+    if(!Image[i]) {
       std::cerr <<"Impossible de créer une Surface SDL!"<<std::endl;
       return false;
     }
@@ -485,7 +485,7 @@ bool Sprite::Nouveau(int Lx,int Ly)
   // Fabrique la surface
   Image[0]=SDL_CreateRGBSurface((Dim[0].bpp-3)*SDL_SRCALPHA,Dim[0].L,Dim[0].H,Dim[0].bpp*8,
 				0xff,0xff00,0xff0000,0xff000000*(Dim[0].bpp-3));
-  if(Image[0]<=NULL) {
+  if(!Image[0]) {
     std::cerr <<"Impossible de créer une Surface SDL!"<<std::endl;
     return false;
   }
diff --git a/src/tableau.cc b/src/tableau.cc
index ddbc096..0b7b1e7 100644
--- a/src/tableau.cc
+++ b/src/tableau.cc
@@ -87,7 +87,7 @@ bool Tableau::Save(void)
   
   // Alloue la mémoire
   Buf=new unsigned char [sizeof(s_Tableau)*N+sizeof(int)+1];
-  if(Buf<=0) return false;
+  if(!Buf) return false;
 
   // Charge les tableaux
   Buf[0]=N/256;