diff --git a/srcpkgs/whysynth/patches/fix_agran.patch b/srcpkgs/whysynth/patches/fix_agran.patch
index 016ec065c21..9457c725320 100644
--- a/srcpkgs/whysynth/patches/fix_agran.patch
+++ b/srcpkgs/whysynth/patches/fix_agran.patch
@@ -1,14 +1,13 @@
 diff --git src/agran_oscillator.c src/agran_oscillator.c
-index 6630215..3bdf555 100644
+index 6630215..3168469 100644
 --- src/agran_oscillator.c
 +++ src/agran_oscillator.c
-@@ -418,7 +418,8 @@ create_grain_envelopes(unsigned long sample_rate)
-                 for (i = 0; i <= peak; i++) {
-                   const float t = (float)i * scale;
-                   const float ampl = expf(-t*t/2);
--                  env[e].data[Y_CONTROL_PERIOD + peak + i] = ampl;
-+                    env[e].data[Y_CONTROL_PERIOD + env[e].length - 1
-+                            - peak + i] = ampl;
+@@ -421,6 +421,9 @@ create_grain_envelopes(unsigned long sample_rate)
+                   env[e].data[Y_CONTROL_PERIOD + peak + i] = ampl;
                    env[e].data[Y_CONTROL_PERIOD + peak - i] = ampl;
                  }
++                if (env[e].length % 2 == 0) { /* if length is even, zero last frame of buffer */
++                    env[e].data[Y_CONTROL_PERIOD + env[e].length - 1] = 0.0f;
++                }
              }
+             break;
diff --git a/srcpkgs/whysynth/template b/srcpkgs/whysynth/template
index 6113a262ba7..06bff029c29 100644
--- a/srcpkgs/whysynth/template
+++ b/srcpkgs/whysynth/template
@@ -1,13 +1,13 @@
-# Template file for 'whysynth'.
+# Template file for 'whysynth'
 pkgname=whysynth
 version=20170701
-revision=1
+revision=2
 build_style=gnu-configure
 hostmakedepends="pkg-config"
 makedepends="gtk+-devel dssi-devel liblo-devel ladspa-sdk alsa-lib-devel fftw-devel"
-maintainer="Olga Ustuzhanina <me@laserbat.pw>"
 short_desc="WhySynth is a versatile multi-mode DSSI softsynth"
+maintainer="Olga Ustuzhanina <me@laserbat.pw>"
+license="GPL-2.0-or-later"
 homepage="http://smbolton.com/whysynth.html"
-license="GPL-2"
 distfiles="http://smbolton.com/whysynth/whysynth-${version}.tar.bz2"
 checksum=a602d685a6bf48b01a82e1c077a50fe3d115805865ecfe49f531d8bd20b00b0b