diff --git a/d3xp/Game_local.cpp b/d3xp/Game_local.cpp
index 9a61712..dc09037 100644
--- a/d3xp/Game_local.cpp
+++ b/d3xp/Game_local.cpp
@@ -2653,7 +2653,7 @@ void idGameLocal::CalcFov( float base_fov, float &fov_x, float &fov_y ) const {
 	// FIXME: somehow, this is happening occasionally
 	assert( fov_y > 0 );
 	if ( fov_y <= 0 ) {
-		Error( "idGameLocal::CalcFov: bad result, fov_y == %f, base_fov == ", fov_y, base_fov );
+		Error( "idGameLocal::CalcFov: bad result, fov_y == %f, base_fov == %f", fov_y, base_fov );
 	}
 
 	switch( r_aspectRatio.GetInteger() ) {
diff --git a/game/Game_local.cpp b/game/Game_local.cpp
index 0517b82..524bc5d 100644
--- a/game/Game_local.cpp
+++ b/game/Game_local.cpp
@@ -2387,7 +2387,7 @@ void idGameLocal::CalcFov( float base_fov, float &fov_x, float &fov_y ) const {
 	// FIXME: somehow, this is happening occasionally
 	assert( fov_y > 0 );
 	if ( fov_y <= 0 ) {
-		Error( "idGameLocal::CalcFov: bad result, fov_y == %f, base_fov == ", fov_y, base_fov );
+		Error( "idGameLocal::CalcFov: bad result, fov_y == %f, base_fov == %f", fov_y, base_fov );
 	}
 
 	switch( r_aspectRatio.GetInteger() ) {
diff --git a/idlib/Parser.cpp b/idlib/Parser.cpp
index 931fd52..86a57d3 100644
--- a/idlib/Parser.cpp
+++ b/idlib/Parser.cpp
@@ -712,9 +712,9 @@ int idParser::ExpandBuiltinDefine( idToken *deftoken, define_t *define, idToken
 			curtime = ctime(&t);
 			(*token) = "\"";
 			token->Append( curtime+4 );
-			token[7] = '\0';
+			token[7] = NULL;
 			token->Append( curtime+20 );
-			token[10] = '\0';
+			token[10] = NULL;
 			token->Append( "\"" );
 			free(curtime);
 			token->type = TT_STRING;
@@ -731,7 +731,7 @@ int idParser::ExpandBuiltinDefine( idToken *deftoken, define_t *define, idToken
 			curtime = ctime(&t);
 			(*token) = "\"";
 			token->Append( curtime+11 );
-			token[8] = '\0';
+			token[8] = NULL;
 			token->Append( "\"" );
 			free(curtime);
 			token->type = TT_STRING;