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-rw-r--r--math/math.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/math/math.h b/math/math.h
index 4e65678b8d..aeb54d9ed8 100644
--- a/math/math.h
+++ b/math/math.h
@@ -261,7 +261,7 @@ enum
       ? __isnan (x) : __isnanl (x))
 # endif
 
-/* Return nonzero value is X is positive or negative infinity.  */
+/* Return nonzero value if X is positive or negative infinity.  */
 # ifdef __NO_LONG_DOUBLE_MATH
 #  define isinf(x) \
      (sizeof (x) == sizeof (float) ? __isinff (x) : __isinf (x))