diff --git a/tests/regression/sgemm_tcore/sgemm_impl.hpp b/tests/regression/sgemm_tcore/sgemm_impl.hpp
index 4d121a0f..76d3755d 100644
--- a/tests/regression/sgemm_tcore/sgemm_impl.hpp
+++ b/tests/regression/sgemm_tcore/sgemm_impl.hpp
@@ -6,7 +6,7 @@
 #include "include/gemmini.h"
 #include "gemmini_mmio.h"
 
-#define FP_SIZE 32
+#define FP_SIZE 16
 
 // "fake" fp16 type that only has the correct data width.
 using float16_t = uint16_t;