diff --git a/format.h b/format.h
index c3e66d1a..97e176b0 100644
--- a/format.h
+++ b/format.h
@@ -407,7 +407,7 @@ inline int getsign(double value) {
   return sign;
 }
 inline int isinfinity(double x) { return !_finite(x); }
-inline int isinfinity( long double x) { return !_finite(static_cast<double>(x)); }
+inline int isinfinity(long double x) { return !_finite(static_cast<double>(x)); }
 #endif
 
 template <typename Char>