diff --git a/kernel/arm64/dznrm2_thunderx2t99.c b/kernel/arm64/dznrm2_thunderx2t99.c
index 6077c85dd..b78878cd4 100644
--- a/kernel/arm64/dznrm2_thunderx2t99.c
+++ b/kernel/arm64/dznrm2_thunderx2t99.c
@@ -345,7 +345,7 @@ FLOAT CNAME(BLASLONG n, FLOAT *x, BLASLONG inc_x)
 #endif
 	FLOAT ssq, scale;
 
-	if (n <= 0 || inc_x <= 0) return 0.0;
+	if (n <= 0 || inc_x == 0) return 0.0;
 
 #if defined(SMP)
 	if (n <= 10000)