diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1e854ed..1fc91c6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,23 +1,30 @@
 
-### 1.0.0 (in development)
+### 1.0.1 (2019-06-27)
+- Fix VCO-1/2 sync being triggered with a negative slope.
 
+### 1.0.0 (2019-06-19)
+- Migrate to v1 API.
+- Add performance optimizations with SIMD.
+- Change brand to "VCV", so modules appear as "VCV VCO-1", etc.
+- Make most modules polyphonic.
+- Change VCO-1/2 method from oversampling to MinBLEP.
 
 ### 0.5.1 (2017-12-19)
 
-- Added Sequential Switch 1 & 2
+- Added Sequential Switch 1 & 2.
 
 ### 0.5.0 (2017-11-21)
 
-- Added 8vert, 8-channel attenuverter
-- Added Unity, 2-channel mixer
-- Changed LED functions in ADSR
+- Added 8vert, 8-channel attenuverter.
+- Added Unity, 2-channel mixer.
+- Changed LED functions in ADSR.
 
 ### 0.4.0 (2017-10-13)
 
-- Added Lissajous mode to Scope
-- Added two LFOs and VCO-2
+- Added Lissajous mode to Scope.
+- Added two LFOs and VCO-2.
 
 ### 0.3.2 (2017-09-25)
 
-- Fixed Drive CV input of VCF
-- Reverted SEQ3 to continuous gates
+- Fixed Drive CV input of VCF.
+- Reverted SEQ3 to continuous gates.
diff --git a/plugin.json b/plugin.json
index b43dd0f..8e67ddd 100644
--- a/plugin.json
+++ b/plugin.json
@@ -1,6 +1,6 @@
 {
   "slug": "Fundamental",
-  "version": "1.0.0",
+  "version": "1.0.1",
   "license": "BSD-3-Clause",
   "name": "Fundamental",
   "brand": "VCV",
diff --git a/src/VCO.cpp b/src/VCO.cpp
index 2e482cc..b92788c 100644
--- a/src/VCO.cpp
+++ b/src/VCO.cpp
@@ -121,9 +121,10 @@ struct VoltageControlledOscillator {
 		// Detect sync
 		// Might be NAN or outside of [0, 1) range
 		if (syncEnabled) {
-			T syncCrossing = -lastSyncValue / (syncValue - lastSyncValue);
+			T deltaSync = syncValue - lastSyncValue;
+			T syncCrossing = -lastSyncValue / deltaSync;
 			lastSyncValue = syncValue;
-			T sync = (0.f < syncCrossing) & (syncCrossing <= 1.f);
+			T sync = (0.f < syncCrossing) & (syncCrossing <= 1.f) & (syncValue >= 0.f);
 			int syncMask = simd::movemask(sync);
 			if (syncMask) {
 				if (soft) {