diff --git a/libvips/freqfilt/fwfft.c b/libvips/freqfilt/fwfft.c
index 618f8db2..8d2880d6 100644
--- a/libvips/freqfilt/fwfft.c
+++ b/libvips/freqfilt/fwfft.c
@@ -117,7 +117,8 @@ rfwfft1( VipsObject *object, VipsImage *in, VipsImage **out )
 	 */
 	t[1] = vips_image_new_buffer();
 	if( vips_cast_double( in, &t[0], NULL ) ||
-		vips_image_write( t[0], t[1] ) ); 
+		vips_image_write( t[0], t[1] ) )
+		return( -1 ); 
 
 	/* Make the plan for the transform. Yes, they really do use nx for
 	 * height and ny for width. Use a separate scratch buffer for the
@@ -231,7 +232,8 @@ cfwfft1( VipsObject *object, VipsImage *in, VipsImage **out )
 	 */
 	t[1] = vips_image_new_buffer();
 	if( vips_cast_dpcomplex( in, &t[0], NULL ) ||
-		vips_image_write( t[0], t[1] ) ); 
+		vips_image_write( t[0], t[1] ) )
+		return( -1 ); 
 
 	/* We have to have a separate buffer for the planner to work on.
 	 */
diff --git a/libvips/freqfilt/invfft.c b/libvips/freqfilt/invfft.c
index e20e5822..9b87b9d0 100644
--- a/libvips/freqfilt/invfft.c
+++ b/libvips/freqfilt/invfft.c
@@ -102,7 +102,8 @@ cinvfft1( VipsObject *object, VipsImage *in, VipsImage **out )
 	 */
 	*out = vips_image_new_buffer();
 	if( vips_cast_dpcomplex( in, &t[0], NULL ) ||
-		vips_image_write( t[0], *out ) ); 
+		vips_image_write( t[0], *out ) )
+		return( -1 ); 
 
 	/* Make the plan for the transform. Yes, they really do use nx for
 	 * height and ny for width.
@@ -150,7 +151,8 @@ rinvfft1( VipsObject *object, VipsImage *in, VipsImage **out )
 	 */
 	t[1] = vips_image_new_buffer();
 	if( vips_cast_dpcomplex( in, &t[0], NULL ) ||
-		vips_image_write( t[0], t[1] ) ); 
+		vips_image_write( t[0], t[1] ) )
+		return( -1 ); 
 
 	/* Build half-complex image.
 	 */
diff --git a/libvips/iofuncs/object.c b/libvips/iofuncs/object.c
index 232e16f2..cf4176eb 100644
--- a/libvips/iofuncs/object.c
+++ b/libvips/iofuncs/object.c
@@ -1762,7 +1762,7 @@ vips_object_set_argument_from_string( VipsObject *object,
 			return( -1 );
 		}
 
-		if( sscanf( value, "%Ld", &l ) != 1 ) {
+		if( sscanf( value, "%lld", &l ) != 1 ) {
 			vips_error( class->nickname,
 				_( "'%s' is not an integer" ), value );
 			return( -1 );