diff --git a/bfast-0.7.0a/bfast/BLib.c b/bfast-0.7.0a/bfast/BLib.c
index 45f1488..1894a6b 100644
--- a/bfast-0.7.0a/bfast/BLib.c
+++ b/bfast-0.7.0a/bfast/BLib.c
@@ -90,7 +90,7 @@ void ToLowerRead(char *r, int readLength)
 }
 
 /* TODO */
-inline char ToUpper(char a)
+char ToUpper(char a)
 {
   if(97 <= a && a < 122) return (char)(a - 32);
   return a;
diff --git a/bfast-0.7.0a/bfast/BLib.h b/bfast-0.7.0a/bfast/BLib.h
index 6c87810..c116899 100644
--- a/bfast-0.7.0a/bfast/BLib.h
+++ b/bfast-0.7.0a/bfast/BLib.h
@@ -16,7 +16,7 @@ int GetFastaHeaderLine(FILE*, char*);
 int ParseFastaHeaderLine(char*);
 char ToLower(char);
 void ToLowerRead(char*, int);
-inline char ToUpper(char);
+char ToUpper(char);
 void ToUpperRead(char*, int);
 void ReverseRead(char*, char*, int);
 void ReverseReadFourBit(int8_t*, int8_t*, int);