diff --git a/network.c b/network.c
index 507dad33..ad127726 100644
--- a/network.c
+++ b/network.c
@@ -609,7 +609,7 @@ int NETReadTillTerm(mkChannel *self, long timeout,
             pBuffer[bufPtr] = '\0';
             return bufPtr;
           } else {
-            matchIndex == 1;
+            matchIndex = 1;
           }
         }
       }
diff --git a/nread.c b/nread.c
index 1364002a..8d917de7 100644
--- a/nread.c
+++ b/nread.c
@@ -295,7 +295,7 @@ extern int VerifyChannel(mkChannel *self); /* defined in network.c */
              /* DFC locking for protocol zero only */
              if (pItem->pCon->iProtocolID == 0 &&
                  CostaLocked(pItem->pCon->pStack))
-               iStat == 0;
+               iStat = 0;
              else
                iStat = CostaTop(pItem->pCon->pStack,pItem->pHold);
              if(!iStat)
@@ -310,7 +310,7 @@ extern int VerifyChannel(mkChannel *self); /* defined in network.c */
               /* DFC locking for protocol zero only */
               if (pItem->pCon->iProtocolID == 0 &&
                   CostaLocked(pItem->pCon->pStack))
-                iStat == 0;
+                iStat = 0;
               else
                 iStat = CostaTop(pItem->pCon->pStack,pPtr);
               if(!iStat)
@@ -528,7 +528,7 @@ extern int VerifyChannel(mkChannel *self); /* defined in network.c */
                                 /* DFC locking for protocol zero only */
                                 if (pItem->pCon->iProtocolID == 0 &&
                                     CostaLocked(pItem->pCon->pStack))
-                                  iStat == 0;
+                                  iStat = 0;
                                 else
                                   iStat = CostaTop(pItem->pCon->pStack,pItem->pHold);
 				/* printf("%s\n",pItem->pHold); */
diff --git a/tasdrive.c b/tasdrive.c
index de3fff85..572f2e26 100644
--- a/tasdrive.c
+++ b/tasdrive.c
@@ -711,7 +711,7 @@ static void KillTasMot(void *pData){
 
   if(self->pDes != NULL){
     DeleteDescriptor(self->pDes);
-    self->pDes == NULL;
+    self->pDes = NULL;
   }
   if(self->pDriv != NULL){
     free(self->pDriv);