diff --git a/SConstruct b/SConstruct
index 48c6ebac7e..0800c402b7 100644
--- a/SConstruct
+++ b/SConstruct
@@ -87,7 +87,7 @@ DEBUGFLAGS	= ['-g', '-DDEBUG']
 BOOSTFLAGS	= ['-DBOOST_TEST_DYN_LINK', '-DBOOST_FILESYSTEM_NO_DEPRECATED']
 
 env.Append(LINKFLAGS = ['-rdynamic', '-pthread'])
-env.Append(CCFLAGS = ['-pthread', '-Wall', '-Wno-sign-compare', '-Wno-char-subscripts', '-DSQLITE_THREADSAFE'])
+env.Append(CCFLAGS = ['-pthread', '-Wall', '-Wno-sign-compare', '-Wno-char-subscripts', '-DSQLITE_THREADSAFE=1'])
 env.Append(CXXFLAGS = ['-O0', '-pthread', '-Wno-invalid-offsetof', '-Wformat']+BOOSTFLAGS+DEBUGFLAGS)
 
 if OSX: