diff --git a/d3xp/Actor.cpp b/d3xp/Actor.cpp
index 107e506..d4638c6 100644
--- a/d3xp/Actor.cpp
+++ b/d3xp/Actor.cpp
@@ -3134,7 +3134,7 @@ idActor::Event_HasAnim
 ================
 */
 void idActor::Event_HasAnim( int channel, const char *animname ) {
-	if ( GetAnim( channel, animname ) != NULL ) {
+	if ( GetAnim( channel, animname ) != 0 ) {
 		idThread::ReturnFloat( 1.0f );
 	} else {
 		idThread::ReturnFloat( 0.0f );
diff --git a/d3xp/Player.cpp b/d3xp/Player.cpp
index dd179a7..e535c7a 100644
--- a/d3xp/Player.cpp
+++ b/d3xp/Player.cpp
@@ -4140,7 +4140,7 @@ idPlayer::GiveVideo
 */
 void idPlayer::GiveVideo( const char *videoName, idDict *item ) {
 
-	if ( videoName == NULL || *videoName == NULL ) {
+	if ( videoName == NULL || *videoName == 0 ) {
 		return;
 	}
 
@@ -4177,7 +4177,7 @@ idPlayer::GiveEmail
 */
 void idPlayer::GiveEmail( const char *emailName ) {
 
-	if ( emailName == NULL || *emailName == NULL ) {
+	if ( emailName == NULL || *emailName == 0 ) {
 		return;
 	}
 
@@ -4204,7 +4204,7 @@ void idPlayer::GivePDA( const char *pdaName, idDict *item )
 		inventory.pdaSecurity.AddUnique( item->GetString( "inv_name" ) );
 	}
 
-	if ( pdaName == NULL || *pdaName == NULL ) {
+	if ( pdaName == NULL || *pdaName == 0 ) {
 		pdaName = "personal";
 	}
 
@@ -6297,7 +6297,7 @@ void idPlayer::UpdatePDAInfo( bool updatePDASel ) {
 
 		const char *security = pda->GetSecurity();
 		if ( j == currentPDA || (currentPDA == 0 && security && *security ) ) {
-			if ( *security == NULL ) {
+			if ( *security == 0 ) {
 				security = common->GetLanguageDict()->GetString( "#str_00066" );
 			}
 			objectiveSystem->SetStateString( "PDASecurityClearance", security );
diff --git a/game/Actor.cpp b/game/Actor.cpp
index f5d26ef..0fb02ad 100644
--- a/game/Actor.cpp
+++ b/game/Actor.cpp
@@ -3063,7 +3063,7 @@ idActor::Event_HasAnim
 ================
 */
 void idActor::Event_HasAnim( int channel, const char *animname ) {
-	if ( GetAnim( channel, animname ) != NULL ) {
+	if ( GetAnim( channel, animname ) != 0 ) {
 		idThread::ReturnFloat( 1.0f );
 	} else {
 		idThread::ReturnFloat( 0.0f );
diff --git a/game/Player.cpp b/game/Player.cpp
index f33d10f..48d7a93 100644
--- a/game/Player.cpp
+++ b/game/Player.cpp
@@ -3281,7 +3281,7 @@ idPlayer::GiveVideo
 */
 void idPlayer::GiveVideo( const char *videoName, idDict *item ) {
 
-	if ( videoName == NULL || *videoName == NULL ) {
+	if ( videoName == NULL || *videoName == 0 ) {
 		return;
 	}
 
@@ -3318,7 +3318,7 @@ idPlayer::GiveEmail
 */
 void idPlayer::GiveEmail( const char *emailName ) {
 
-	if ( emailName == NULL || *emailName == NULL ) {
+	if ( emailName == NULL || *emailName == 0 ) {
 		return;
 	}
 
@@ -3345,7 +3345,7 @@ void idPlayer::GivePDA( const char *pdaName, idDict *item )
 		inventory.pdaSecurity.AddUnique( item->GetString( "inv_name" ) );
 	}
 
-	if ( pdaName == NULL || *pdaName == NULL ) {
+	if ( pdaName == NULL || *pdaName == 0 ) {
 		pdaName = "personal";
 	}
 
@@ -5249,7 +5249,7 @@ void idPlayer::UpdatePDAInfo( bool updatePDASel ) {
 
 		const char *security = pda->GetSecurity();
 		if ( j == currentPDA || (currentPDA == 0 && security && *security ) ) {
-			if ( *security == NULL ) {
+			if ( *security == 0 ) {
 				security = common->GetLanguageDict()->GetString( "#str_00066" );
 			}
 			objectiveSystem->SetStateString( "PDASecurityClearance", security );