diff --git a/src/gprs_rlcmac_ts_alloc.cpp b/src/gprs_rlcmac_ts_alloc.cpp
index 5ccbb9f..3c16d8a 100644
--- a/src/gprs_rlcmac_ts_alloc.cpp
+++ b/src/gprs_rlcmac_ts_alloc.cpp
@@ -421,7 +421,7 @@
 	tbf_->first_ts = tbf_->first_common_ts = ts;
 	ms_set_reserved_slots(ms, trx, 1 << ts, 1 << ts);
 
-	tbf_->upgrade_to_multislot = 0;
+	tbf_->upgrade_to_multislot = false;
 	bts_do_rate_ctr_inc(bts, CTR_TBF_ALLOC_ALGO_A);
 	return 0;
 }
@@ -945,7 +945,7 @@
 		tbf_->upgrade_to_multislot = (avail_count > slotcount);
 		LOGPAL(tbf, "B", single, use_trx, LOGL_INFO, "using single slot at TS %d\n", first_ts);
 	} else {
-		tbf_->upgrade_to_multislot = 0;
+		tbf_->upgrade_to_multislot = false;
 		LOGPAL(tbf, "B", single, use_trx, LOGL_INFO, "using %d slots\n", slotcount);
 	}
 
diff --git a/src/tbf.cpp b/src/tbf.cpp
index 842161c..74a44d9 100644
--- a/src/tbf.cpp
+++ b/src/tbf.cpp
@@ -110,7 +110,7 @@
 	control_ts(0xff),
 	fT(0),
 	num_fT_exp(0),
-	upgrade_to_multislot(0),
+	upgrade_to_multislot(false),
 	bts(bts_),
 	m_tfi(0),
 	m_created_ts(0),
diff --git a/src/tbf.h b/src/tbf.h
index 96a5788..4218cf5 100644
--- a/src/tbf.h
+++ b/src/tbf.h
@@ -265,7 +265,7 @@
 	} meas;
 
 	/* Can/should we upgrade this tbf to use multiple slots? */
-	uint8_t upgrade_to_multislot;
+	bool upgrade_to_multislot;
 
 	/* store the BTS this TBF belongs to */
 	struct gprs_rlcmac_bts *bts;