diff --git a/src/amd/vulkan/radv_cmd_buffer.c b/src/amd/vulkan/radv_cmd_buffer.c
index dd6deef17c8..5b7564c6399 100644
--- a/src/amd/vulkan/radv_cmd_buffer.c
+++ b/src/amd/vulkan/radv_cmd_buffer.c
@@ -685,6 +685,9 @@ radv_emit_fragment_shader(struct radv_cmd_buffer *cmd_buffer,
 	radeon_set_context_reg(cmd_buffer->cs, R_0286D0_SPI_PS_INPUT_ADDR,
 			       ps->config.spi_ps_input_addr);
 
+	if (ps->info.fs.force_persample)
+		spi_baryc_cntl |= S_0286E0_POS_FLOAT_LOCATION(2);
+
 	radeon_set_context_reg(cmd_buffer->cs, R_0286D8_SPI_PS_IN_CONTROL,
 			       S_0286D8_NUM_INTERP(ps->info.fs.num_interp));