diff --git a/pkgs/by-name/pa/paml/fix-ProcessNodeAnnotation-declaration.patch b/pkgs/by-name/pa/paml/fix-ProcessNodeAnnotation-declaration.patch
new file mode 100644
index 000000000000..ffe065566ec0
--- /dev/null
+++ b/pkgs/by-name/pa/paml/fix-ProcessNodeAnnotation-declaration.patch
@@ -0,0 +1,11 @@
+--- a/src/mcmctree.c
++++ b/src/mcmctree.c
+@@ -42,7 +42,7 @@ extern double PjumpOptimum;
+
+ int GetOptions(char *ctlf);
+ int ReadTreeSeqs(FILE*fout);
+-int ProcessNodeAnnotation();
++int ProcessNodeAnnotation(int* haslabel);
+ int ReadBlengthGH(char infile[]);
+ int GenerateBlengthGH(char infile[]);
+ int GetMem(void);
diff --git a/pkgs/by-name/pa/paml/package.nix b/pkgs/by-name/pa/paml/package.nix
index 5de83b4b243a..2910b1f3f966 100644
--- a/pkgs/by-name/pa/paml/package.nix
+++ b/pkgs/by-name/pa/paml/package.nix
@@ -15,6 +15,11 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-P/oHaLxoQzjFuvmHyRdShHv1ayruy6O/I9w8aTyya2s=";
   };
 
+  patches = [
+    # https://github.com/abacus-gene/paml/pull/78
+    ./fix-ProcessNodeAnnotation-declaration.patch
+  ];
+
   env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.hostPlatform.isDarwin "-D_POSIX_C_SOURCE";
 
   preBuild = ''