diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 403a958..c0e0420 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -2,7 +2,8 @@ name: Build
 
 on:
   push:
-    branches: [main]
+    branches:
+      - '**'
   pull_request:
     branches: [main]
 
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8ed465d..ab37cf0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -36,6 +36,13 @@ file(GLOB RAW_PDB_SRCS third_party/raw_pdb/src/*.cpp)
 add_library(raw_pdb STATIC ${RAW_PDB_SRCS})
 target_include_directories(raw_pdb PUBLIC third_party/raw_pdb/src)
 target_compile_features(raw_pdb PRIVATE cxx_std_11)
+# PDB_CRT.h forward-declares printf/memcmp/etc with __cdecl which conflicts
+# with MinGW.  Force-include a prefix header that pulls in the real CRT headers
+# and strips __cdecl so the redeclarations are compatible.
+if(MINGW)
+    target_compile_options(raw_pdb PUBLIC
+        -include "${CMAKE_CURRENT_SOURCE_DIR}/cmake/raw_pdb_prefix.h")
+endif()
 if(WIN32)
     target_link_libraries(raw_pdb PRIVATE rpcrt4)
 endif()
diff --git a/cmake/raw_pdb_prefix.h b/cmake/raw_pdb_prefix.h
new file mode 100644
index 0000000..81b1d53
--- /dev/null
+++ b/cmake/raw_pdb_prefix.h
@@ -0,0 +1,29 @@
+// Force-included before every raw_pdb translation unit (and consumers).
+// PDB_CRT.h forward-declares printf/memcmp/etc with extern "C" __cdecl,
+// which conflicts with MinGW's CRT headers (C++ linkage, no __cdecl).
+//
+// Fix: include the real CRT headers, then include PDB_CRT.h with function
+// names macro-renamed to harmless dummies.  This triggers #pragma once so
+// no raw_pdb source file ever processes PDB_CRT.h's conflicting declarations.
+//
+// Guarded with __cplusplus because PUBLIC propagation applies this to C
+// sources (fadec) where PDB_CRT.h is irrelevant and <cstdio> doesn't exist.
+#ifdef __cplusplus
+#include <cstdio>
+#include <cstring>
+
+#undef  __cdecl
+#define __cdecl
+
+#define printf  _pdb_crt_unused_printf
+#define memcmp  _pdb_crt_unused_memcmp
+#define memcpy  _pdb_crt_unused_memcpy
+#define strlen  _pdb_crt_unused_strlen
+#define strcmp  _pdb_crt_unused_strcmp
+#include "Foundation/PDB_CRT.h"
+#undef printf
+#undef memcmp
+#undef memcpy
+#undef strlen
+#undef strcmp
+#endif