diff --git a/sys/src/cmd/awk/main.c b/sys/src/cmd/awk/main.c
index 3d1ae4e0d..2695de56d 100644
--- a/sys/src/cmd/awk/main.c
+++ b/sys/src/cmd/awk/main.c
@@ -55,6 +55,8 @@ void main(int argc, char *argv[])
 	char *fs = nil, *marg;
 	int temp;
 
+	setfcr(getfcr() & ~FPINVAL);
+
 	Binit(&stdin, 0, OREAD);
 	Binit(&stdout, 1, OWRITE);
 	Binit(&stderr, 2, OWRITE);