diff --git a/pkgs/development/compilers/gcc/11/default.nix b/pkgs/development/compilers/gcc/11/default.nix
index b2330abd4b75b..54e5e9bbfcc2e 100644
--- a/pkgs/development/compilers/gcc/11/default.nix
+++ b/pkgs/development/compilers/gcc/11/default.nix
@@ -87,7 +87,9 @@ let majorVersion = "11";
       ++ optional (!crossStageStatic && targetPlatform.isMinGW && threadsCross.model == "mcf") ./Added-mcf-thread-model-support-from-mcfgthread.patch
 
       # openjdk build fails without this on -march=opteron; is upstream in gcc12
-      ++ [ ./gcc-issue-103910.patch ];
+      ++ [ ./gcc-issue-103910.patch ]
+
+      ++ optional (langFortran && crossMingw) ../mingw-gfortran-no-pthread_t-alias.patch;
 
     /* Cross-gcc settings (build == host != target) */
     crossMingw = targetPlatform != hostPlatform && targetPlatform.libc == "msvcrt";
diff --git a/pkgs/development/compilers/gcc/12/default.nix b/pkgs/development/compilers/gcc/12/default.nix
index 78dc30a34463e..76979647d1840 100644
--- a/pkgs/development/compilers/gcc/12/default.nix
+++ b/pkgs/development/compilers/gcc/12/default.nix
@@ -121,7 +121,9 @@ let majorVersion = "12";
       ++ optional (stdenv.isDarwin && langAda) ../gnat-darwin-dylib-install-name.patch
 
       # Obtain latest patch with ../update-mcfgthread-patches.sh
-      ++ optional (!crossStageStatic && targetPlatform.isMinGW && threadsCross.model == "mcf") ./Added-mcf-thread-model-support-from-mcfgthread.patch;
+      ++ optional (!crossStageStatic && targetPlatform.isMinGW && threadsCross.model == "mcf") ./Added-mcf-thread-model-support-from-mcfgthread.patch
+
+      ++ optional (langFortran && crossMingw) ../mingw-gfortran-no-pthread_t-alias.patch;
 
     /* Cross-gcc settings (build == host != target) */
     crossMingw = targetPlatform != hostPlatform && targetPlatform.libc == "msvcrt";
diff --git a/pkgs/development/compilers/gcc/mingw-gfortran-no-pthread_t-alias.patch b/pkgs/development/compilers/gcc/mingw-gfortran-no-pthread_t-alias.patch
new file mode 100644
index 0000000000000..20037c21bc4c2
--- /dev/null
+++ b/pkgs/development/compilers/gcc/mingw-gfortran-no-pthread_t-alias.patch
@@ -0,0 +1,13 @@
+diff --git a/libgfortran/io/async.h b/libgfortran/io/async.h
+index efd542a..d57722a 100644
+--- a/libgfortran/io/async.h
++++ b/libgfortran/io/async.h
+@@ -351,7 +351,7 @@ typedef struct async_unit
+   struct adv_cond work;
+   struct adv_cond emptysignal;
+   struct st_parameter_dt *pdt;
+-  pthread_t thread;
++  __gthread_t thread;
+   struct transfer_queue *head;
+   struct transfer_queue *tail;
+