diff --git a/SConscript.irdb b/SConscript.irdb
index 26d32644165a2826a96450110ee6583c0e024841..d78190bb3855da02501af13cfaeda802def382dc 100644
--- a/SConscript.irdb
+++ b/SConscript.irdb
@@ -38,11 +38,11 @@ IRDB_LDFLAGS=" "
 
 # set 32/64 bit build properly
 if int(argenv['do_64bit_build']) == 1:
-	IRDB_CCFLAGS+=" -m64"
-	IRDB_LDFLAGS+=" -m64"
+	IRDB_CCFLAGS+=" -m64 "
+	IRDB_LDFLAGS+=" -m64 "
 else:
-	IRDB_CCFLAGS+=" -m32"
-	IRDB_LDFLAGS+=" -m32"
+	IRDB_CCFLAGS+=" -m32 "
+	IRDB_LDFLAGS+=" -m32 "