diff --git a/src/FxEngine/zbuffer.c b/src/FxEngine/zbuffer.c
index a7a9805..15a94f8 100644
--- a/src/FxEngine/zbuffer.c
+++ b/src/FxEngine/zbuffer.c
@@ -26,12 +26,13 @@ static const uint32_t size_char = size_uint32*sizeof(int32_t);
 static int32_t* address=0;
 
 const int32_t clearval=3000;
-
 void FE_zbuffer_clear()
 {
     if (address==0)
     {
-        address = malloc(size_char);
+        address = (int32_t*)malloc(size_char+3);
+        address/=4;
+        address*=4;
         if (address==0) // cas de figure où il n'y a plus assez de RAM
         {
             dclear(C_WHITE);
@@ -43,24 +44,21 @@ void FE_zbuffer_clear()
     }
     // TODO déterminer le type d'effacement
     if (isSH3())
-    { // effacement fait par le CPU
-        uint32_t indice;
+    { // effacement CPU
+        uint_fast16_t indice;
         for (indice = 0; indice < size_uint32; indice ++)
             address[indice] = clearval;
     }
     else
-    { // effacement fait par le DMA
+    { // effacement DMA
         dma_transfer(0, DMA_32B, size_uint32, &clearval, DMA_FIXED, address, DMA_INC);
     }
-    
-
 }
 
 void FE_start_rendering()
 {
-    if (isSH3())
-        return;
-    dma_transfer_wait(0);
+    if (!isSH3())
+        dma_transfer_wait(0);
 
 }