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-rw-r--r--math/w_fmod.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/math/w_fmod.c b/math/w_fmod.c
index 43a1d8ef5c..ca01cf2ac5 100644
--- a/math/w_fmod.c
+++ b/math/w_fmod.c
@@ -35,8 +35,9 @@ static char rcsid[] = "$NetBSD: w_fmod.c,v 1.6 1995/05/10 20:48:55 jtc Exp $";
 	double z;
 	z = __ieee754_fmod(x,y);
 	if(_LIB_VERSION == _IEEE_ ||__isnan(y)||__isnan(x)) return z;
-	if(y==0.0) {
-	        return __kernel_standard(x,y,27); /* fmod(x,0) */
+	if(__isinf(x)||y==0.0) {
+		/* fmod(+-Inf,y) or fmod(x,0) */
+	        return __kernel_standard(x,y,27);
 	} else
 	    return z;
 #endif