diff --git a/first/c.pm b/first/c.pm
index eeb31388..ed410f0a 100644
--- a/first/c.pm
+++ b/first/c.pm
@@ -17,7 +17,7 @@ CPROGRAM = "%CCOMPILER% %CBUILDFLAGS% %CLINKFLAGS% %CEXTRAFLAGS% -o %out% %in% %
 CDEPENDS = "%CCOMPILER% %CBUILDFLAGS% %CDYNINCLUDES% %CINCLUDES% %CDEFINES% %CEXTRAFLAGS% -MM -MG %in% > %out%"
 AR = "%RM% %out% && ar cr %out% %in%"
 
-CBUILDFLAGS = "-g -Os"
+CBUILDFLAGS = "-g"
 CINCLUDES = {}
 CDEFINES = {}
 CEXTRAFLAGS = ""