diff --git a/libstdc++-v3/libsupc++/guard.cc b/libstdc++-v3/libsupc++/guard.cc
index 4d76c308f4a1d9153d6200896c29268f49aee4d5..255108f5f7e8163203250c593d53405166b4886b 100644
--- a/libstdc++-v3/libsupc++/guard.cc
+++ b/libstdc++-v3/libsupc++/guard.cc
@@ -30,7 +30,7 @@
 
 #include <cxxabi.h>
 
-// The IA64/generic ABI uses the fist byte of the guard variable.
+// The IA64/generic ABI uses the first byte of the guard variable.
 // The ARM EABI uses the least significant bit.
 
 namespace __cxxabiv1