diff --git a/audio/din/distinfo b/audio/din/distinfo
index 7575e7511f81..8c55751959fc 100644
--- a/audio/din/distinfo
+++ b/audio/din/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1626083256
-SHA256 (din-51.1.tar.gz) = 783484ef6e13f1e8da7239d02c2c1f13b0c3c6917dbd200441fb227aa6e3a7e8
-SIZE (din-51.1.tar.gz) = 3700738
+TIMESTAMP = 1626222892
+SHA256 (din-51.1.tar.gz) = 4cdeebba091a8ed298840ccdecf204089d8481c5599bbd8bd526f3466a728e7c
+SIZE (din-51.1.tar.gz) = 3700748
diff --git a/audio/din/files/patch-src_ball.cc b/audio/din/files/patch-src_ball.cc
new file mode 100644
index 000000000000..c786baad8a95
--- /dev/null
+++ b/audio/din/files/patch-src_ball.cc
@@ -0,0 +1,13 @@
+Fixes the redeclaration error. float vs const float.
+
+--- src/ball.cc.orig	2021-07-12 10:55:38 UTC
++++ src/ball.cc
+@@ -14,7 +14,7 @@
+ using namespace std;
+ 
+ extern mondrian mondrian0;
+-extern float PI_BY_180;
++extern const float PI_BY_180;
+ extern float TWO_PI;
+ extern int TRAILSIZE;
+ 
diff --git a/audio/din/files/patch-src_modulator.h b/audio/din/files/patch-src_modulator.h
new file mode 100644
index 000000000000..3f582d51c6cc
--- /dev/null
+++ b/audio/din/files/patch-src_modulator.h
@@ -0,0 +1,13 @@
+Fixes the redeclaration error. float vs const float.
+
+--- src/modulator.h.orig	2021-07-12 11:03:15 UTC
++++ src/modulator.h
+@@ -70,7 +70,7 @@ struct autorotator {
+   inline void setdeg (float d) {
+     deg = d;
+     if (deg < 0.0f) deg = 0.0f;
+-    extern float PI_BY_180;
++    extern const float PI_BY_180;
+     angle.persec = deg * PI_BY_180;
+   }
+ 
diff --git a/audio/din/files/patch-src_mondrian.cc b/audio/din/files/patch-src_mondrian.cc
new file mode 100644
index 000000000000..18620eac5a2f
--- /dev/null
+++ b/audio/din/files/patch-src_mondrian.cc
@@ -0,0 +1,13 @@
+Fixes the redeclaration error. float vs const float.
+
+--- src/mondrian.cc.orig	2021-07-12 13:10:37 UTC
++++ src/mondrian.cc
+@@ -42,7 +42,7 @@ extern gotog _gotomax;
+ extern int quit;
+ extern beat2value octave_shift;
+ extern float GOLDEN_RATIO;
+-extern float PI_BY_180;
++extern const float PI_BY_180;
+ extern int IPS; 
+ extern std::map <string, float> INTERVALS;
+ extern oscilloscope scope;