diff --git openjdk/hotspot/src/share/vm/utilities/globalDefinitions_gcc.hpp openjdk/hotspot/src/share/vm/utilities/globalDefinitions_gcc.hpp
index 659d4da..68a06d5 100644
--- openjdk/hotspot/src/share/vm/utilities/globalDefinitions_gcc.hpp
+++ openjdk/hotspot/src/share/vm/utilities/globalDefinitions_gcc.hpp
@@ -253,7 +253,7 @@ inline int g_isnan(double f) { return isnand(f); }
 #elif defined(__APPLE__)
 inline int g_isnan(double f) { return isnan(f); }
 #elif defined(LINUX) || defined(_ALLBSD_SOURCE)
-inline int g_isnan(float  f) { return isnanf(f); }
+inline int g_isnan(float  f) { return __isnanf(f); }
 inline int g_isnan(double f) { return isnan(f); }
 #else
 #error "missing platform-specific definition here"