diff --git a/kermit/dialer/kconnect.cpp b/kermit/dialer/kconnect.cpp
index 84c981f3..45e0ca42 100644
--- a/kermit/dialer/kconnect.cpp
+++ b/kermit/dialer/kconnect.cpp
@@ -287,7 +287,7 @@ kcopy(char *source, char *destination) {
 
         x = strlen(destination);
         len = strlen(destination) + strlen(source) + 2;
-        if (!(p = (char *)malloc(len)))
+        if ((p = (char *)malloc(len)) == NULL)
           return(-1);
         strcpy(p,destination);          /* Directory part */
         if (!ISDIRSEP(*(destination+x-1))) /* Separator, if needed */
@@ -296,7 +296,7 @@ kcopy(char *source, char *destination) {
         strcat(p,q);                    /* Concatenate to new directory */
     } else {
         len = strlen(destination) + 64;
-        if (!(p = (char *)malloc(len)))
+        if ((p = (char *)malloc(len)) == NULL)
           return(-1);
         strcpy(p,destination);
     }
@@ -332,7 +332,7 @@ kmkdir(const char *path) {
     x = strlen(path);
     if (x < 1 || x > CKMAXPATH)           /* Check length */
       return(-1);
-    if (!(tp = (char *)malloc(x+1)))            /* Make a temporary copy */
+    if ((tp = (char *)malloc(x+1)) == NULL)            /* Make a temporary copy */
       return(-1);
     strcpy(tp,path);
 
@@ -735,7 +735,7 @@ K_CONNECTOR::K_CONNECTOR(void)
         if ( !isdir(dir) ) {
             kmkdir(dir);
 
-            if ( common = GetAppData(1) ) {
+            if ( (common = GetAppData(1)) != NULL ) {
                 sprintf(file,"%s%s",(char *)common, "Kermit 95\\K95CUSTOM.INI");
                 kcopy(file,dir);
                 appdata = GetAppData(0);
@@ -7227,7 +7227,7 @@ StartKermit( KD_LIST_ITEM * entry, KD_CONFIG * config, KD_LIST_ITEM * def_entry
    }
 
     if (!StartKermitFileName && 
-	 !(StartKermitFileName = (ZIL_ICHAR *) new ZIL_ICHAR[BUFFERSIZE])) {
+	  (StartKermitFileName = (ZIL_ICHAR *) new ZIL_ICHAR[BUFFERSIZE]) == NULL) {
 
         if ( !StartKermitFileName )
             OutofMemory("Unable to create MESSAGE_WINDOW StartKermit 3");
@@ -8403,7 +8403,7 @@ ExportLocations(void)
     }
 
     if (!StartKermitFileName && 
-	 !(StartKermitFileName = (ZIL_ICHAR *) new ZIL_ICHAR[BUFFERSIZE])) {
+	  (StartKermitFileName = (ZIL_ICHAR *) new ZIL_ICHAR[BUFFERSIZE]) == NULL) {
         if ( !StartKermitFileName )
             OutofMemory("Unable to create ICHAR ExportLocations 1");
 
@@ -8511,7 +8511,7 @@ ExportModems(void)
     }
 
     if (!StartKermitFileName && 
-	 !(StartKermitFileName = (ZIL_ICHAR *) new ZIL_ICHAR[BUFFERSIZE])) {
+	  (StartKermitFileName = (ZIL_ICHAR *) new ZIL_ICHAR[BUFFERSIZE]) == NULL) {
         if ( !StartKermitFileName )
             OutofMemory("Unable to create ICHAR ExportModems");
 #ifdef WIN32
@@ -8669,7 +8669,7 @@ CreateShortcut( KD_LIST_ITEM * entry, KD_CONFIG * config, KD_LIST_ITEM * def_ent
     }
 
     if (!StartKermitFileName && 
-	 !(StartKermitFileName = (ZIL_ICHAR *) new ZIL_ICHAR[BUFFERSIZE])) {
+	  (StartKermitFileName = (ZIL_ICHAR *) new ZIL_ICHAR[BUFFERSIZE]) == NULL) {
         if ( !StartKermitFileName )
             OutofMemory("Unable to create ICHAR CreateShortcut");
 #ifdef WIN32
@@ -8945,7 +8945,7 @@ CreateScriptFile( KD_LIST_ITEM * entry, KD_CONFIG * config, KD_LIST_ITEM * def_e
     }
 
     if (!StartKermitFileName && 
-	 !(StartKermitFileName = (ZIL_ICHAR *) new ZIL_ICHAR[BUFFERSIZE])) {
+	  (StartKermitFileName = (ZIL_ICHAR *) new ZIL_ICHAR[BUFFERSIZE]) == NULL) {
         if ( !StartKermitFileName )
             OutofMemory("Unable to create ICHAR CreateScriptFile");
 #ifdef WIN32
diff --git a/kermit/dialer/kquick.cpp b/kermit/dialer/kquick.cpp
index ab93f1ee..d0a7b270 100644
--- a/kermit/dialer/kquick.cpp
+++ b/kermit/dialer/kquick.cpp
@@ -39,7 +39,7 @@ void K_QUICK::PopulateList( enum TRANSPORT type )
     UIW_COMBO_BOX * combo = (UIW_COMBO_BOX *) Get( COMBO_QUICK );
     UIW_VT_LIST * quicklist  = (UIW_VT_LIST *) Get( LIST_QUICK );
     UIW_BUTTON * button = NULL;
-    while ( button = (UIW_BUTTON *) quicklist->First() ) {
+    while ( (button = (UIW_BUTTON *)quicklist->First()) != NULL ) {
         *quicklist - button;
         delete button;
     }
diff --git a/kermit/dialer/ksetgeneral.cpp b/kermit/dialer/ksetgeneral.cpp
index 2382e0f0..2ddb29d6 100644
--- a/kermit/dialer/ksetgeneral.cpp
+++ b/kermit/dialer/ksetgeneral.cpp
@@ -912,7 +912,7 @@ InitTCPProtoList()
 {
     UIW_BUTTON * button;
     UIW_VT_LIST * list = (UIW_VT_LIST *) Get( LIST_TCP_PROTOCOL ) ;
-    while ( button = (UIW_BUTTON *) list->First() ) {
+    while ( (button = (UIW_BUTTON *)list->First()) != NULL ) {
         *list - button;
         delete button;
     }
@@ -995,7 +995,7 @@ InitSSHProtoList()
 {
     UIW_BUTTON * button;
     UIW_VT_LIST * list = (UIW_VT_LIST *) Get( LIST_TCP_PROTOCOL ) ;
-    while ( button = (UIW_BUTTON *) list->First() ) {
+    while ( (button = (UIW_BUTTON *)list->First()) != NULL ) {
         *list - button;
         delete button;
     }
diff --git a/kermit/dialer/ksetprinter.cpp b/kermit/dialer/ksetprinter.cpp
index f472388b..74953a60 100644
--- a/kermit/dialer/ksetprinter.cpp
+++ b/kermit/dialer/ksetprinter.cpp
@@ -18,8 +18,12 @@
 extern "C" {
 #include "ckcdeb.h"             /* Typedefs, debug formats, etc */
 #include "ckucmd.h"
+#ifdef printf
 #undef printf
+#endif
+#ifdef fprintf
 #undef fprintf
+#endif
 #include <windows.h>            	/* Windows Definitions */
 }
 #endif /* WIN32 */
@@ -809,7 +813,7 @@ Win32EnumPrt( struct keytab ** pTable, struct keytab ** pTable2, int * pN )
     // (simple error checking, if these work assume rest will too)
     //
 
-    if (!(pPrtInfo2 = (LPPRINTER_INFO_2) LocalAlloc (LPTR, dwBytesNeeded)))
+    if ((pPrtInfo2 = (LPPRINTER_INFO_2)LocalAlloc (LPTR, dwBytesNeeded)) == NULL)
     {
         return(FALSE);
     }
diff --git a/kermit/dialer/main.cpp b/kermit/dialer/main.cpp
index 879af3d2..e73e1514 100644
--- a/kermit/dialer/main.cpp
+++ b/kermit/dialer/main.cpp
@@ -15,8 +15,8 @@
 #include "kwinmgr.hpp"
 #ifdef WIN32
 extern "C" {
-#define OS2 
-#define NT  
+//#define OS2 
+//#define NT  
 #include "ckcdeb.h"
 #include "ckoetc.h"
 #ifndef NODIAL
@@ -278,7 +278,7 @@ int UI_APPLICATION::Main(void)
 #ifdef WIN32
 #ifndef NODIAL
     printf("Checking TAPI\n");
-    if (TapiAvail = cktapiinit(hInstance)) {
+    if ((TapiAvail = cktapiinit(hInstance)) != 0) {
         printf("TAPI available\n");
         cktapiopen();
         printf("TAPI Open\n");