diff --git a/param.h b/param.h
index 198839b4f..aa7cede0c 100644
--- a/param.h
+++ b/param.h
@@ -1696,7 +1696,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #define ZGEMM_DEFAULT_P 256
 
 #ifdef WINDOWS_ABI
-#define SGEMM_DEFAULT_Q 320
+#define SGEMM_DEFAULT_Q 192
 #define DGEMM_DEFAULT_Q 128
 #else
 #define SGEMM_DEFAULT_Q 192