diff --git a/srcpkgs/rmilter/patches/fix-gcc11.patch b/srcpkgs/rmilter/patches/fix-gcc11.patch
new file mode 100644
index 00000000000..a9bd6601a88
--- /dev/null
+++ b/srcpkgs/rmilter/patches/fix-gcc11.patch
@@ -0,0 +1,20 @@
+--- a/compat/blake2.h
++++ b/compat/blake2.h
+@@ -61,7 +61,7 @@
+     uint8_t  personal[BLAKE2S_PERSONALBYTES];  // 32
+   } blake2s_param;
+ 
+-  BLAKE2_ALIGN( 64 ) typedef struct __blake2s_state
++  typedef struct BLAKE2_ALIGN( 64 ) __blake2s_state
+   {
+     uint32_t h[8];
+     uint32_t t[2];
+@@ -86,7 +86,7 @@
+     uint8_t  personal[BLAKE2B_PERSONALBYTES];  // 64
+   } blake2b_param;
+ 
+-  BLAKE2_ALIGN( 64 ) typedef struct __blake2b_state
++  typedef struct BLAKE2_ALIGN( 64 ) __blake2b_state
+   {
+     uint64_t h[8];
+     uint64_t t[2];