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-rw-r--r--Src/math.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/Src/math.c b/Src/math.c
index 4f24361a4..777ad9c31 100644
--- a/Src/math.c
+++ b/Src/math.c
@@ -863,7 +863,7 @@ zzlex(void)
 
 		p = ptr;
 		ptr = ie;
-		if (ie - p == 3) {
+		if (ie - p == 3 && !EMULATION(EMULATE_SH)) {
 		    if ((p[0] == 'N' || p[0] == 'n') &&
 			(p[1] == 'A' || p[1] == 'a') &&
 			(p[2] == 'N' || p[2] == 'n')) {