diff --git a/src/build.mk b/src/build.mk
index 9cc141bf9..1fdf14666 100644
--- a/src/build.mk
+++ b/src/build.mk
@@ -70,7 +70,7 @@ CINNABAR_OBJECTS += regex.o
 PATCHES = $(notdir $(wildcard $(SOURCE_DIR)/src/*.patch))
 
 define patch
-$1.patched.c: $$(SOURCE_DIR)/src/$1.c.patch $$(firstword $$(wildcard $$(SOURCE_DIR)/git-core/$1.c $$(SOURCE_DIR)/git-core/builtin/$1.c $$(SOURCE_DIR)/git-core/compat/win32/$1.c))
+$1.patched.c: $$(SOURCE_DIR)/src/$1.c.patch $$(firstword $$(wildcard $$(SOURCE_DIR)/git-core/$1.c $$(SOURCE_DIR)/git-core/builtin/$1.c $$(SOURCE_DIR)/git-core/compat/$1.c $$(SOURCE_DIR)/git-core/compat/win32/$1.c))
 	patch -p1 -F0 -o $$@ $$(lastword $$^) < $$<
 endef
 
@@ -99,7 +99,7 @@ missing_obj_dirs := $(filter-out $(wildcard $(obj_dirs)),$(obj_dirs))
 $(ALL_CINNABAR_OBJECTS) $(LIB_OBJS) $(REFTABLE_OBJS) $(XDIFF_OBJS): $(missing_obj_dirs)
 endif
 
-PATCHED_GIT_OBJECTS := $(filter-out fast-import.patched.o,$(PATCHES:%.c.patch=%.patched.o))
+PATCHED_GIT_OBJECTS := $(filter-out mingw.patched.o fast-import.patched.o,$(PATCHES:%.c.patch=%.patched.o))
 ifeq (,$(filter compat/win32/fscache.o,$(LIB_OBJS)))
 PATCHED_GIT_OBJECTS := $(filter-out fscache.patched.o,$(PATCHED_GIT_OBJECTS))
 endif
@@ -137,6 +137,9 @@ linker-flags: GIT-LDFLAGS FORCE
 $(CINNABAR_OBJECTS): %.o: $(SOURCE_DIR)/src/%.c
 $(PATCHED_GIT_OBJECTS): %.o: %.c
 cinnabar-fast-import.o: fast-import.patched.c
+ifeq ($(uname_S),MINGW)
+mingw.o: mingw.patched.c
+endif
 $(ALL_CINNABAR_OBJECTS): GIT-CFLAGS $(missing_dep_dirs)
 
 $(ALL_CINNABAR_OBJECTS):
diff --git a/src/mingw.c b/src/mingw.c
index be5c4043b..08596ddda 100644
--- a/src/mingw.c
+++ b/src/mingw.c
@@ -8,7 +8,7 @@ static inline void winansi_init(void) {}
 extern int cinnabar_main(int argc, const char *argv[]);
 // Work around the function being declared despite NO_UNIX_SOCKETS.
 int mingw_have_unix_sockets(void);
-#include "compat/mingw.c"
+#include "mingw.patched.c"
 #else
 typedef int make_pedantic_happy;
 #endif
diff --git a/src/mingw.c.patch b/src/mingw.c.patch
new file mode 100644
index 000000000..80b6d767e
--- /dev/null
+++ b/src/mingw.c.patch
@@ -0,0 +1,57 @@
+diff --git a/compat/mingw.c b/compat/mingw.c
+index 303ffaa19f..e87f407f95 100644
+--- a/compat/mingw.c
++++ b/compat/mingw.c
+@@ -1,30 +1,30 @@
+-#include "../git-compat-util.h"
++#include "git-compat-util.h"
+ #include "win32.h"
+ #include <aclapi.h>
+ #include <sddl.h>
+ #include <conio.h>
+ #include <wchar.h>
+ #include <winioctl.h>
+-#include "../strbuf.h"
+-#include "../run-command.h"
+-#include "../abspath.h"
+-#include "../alloc.h"
++#include "strbuf.h"
++#include "run-command.h"
++#include "abspath.h"
++#include "alloc.h"
+ #include "win32/exit-process.h"
+ #include "win32/lazyload.h"
+-#include "../config.h"
+-#include "../environment.h"
+-#include "../trace2.h"
+-#include "../symlinks.h"
+-#include "../wrapper.h"
++#include "config.h"
++#include "environment.h"
++#include "trace2.h"
++#include "symlinks.h"
++#include "wrapper.h"
+ #include "dir.h"
+ #include "gettext.h"
+ #define SECURITY_WIN32
+ #include <sspi.h>
+-#include "../write-or-die.h"
+-#include "../repository.h"
++#include "write-or-die.h"
++#include "repository.h"
+ #include "win32/fscache.h"
+-#include "../attr.h"
+-#include "../string-list.h"
++#include "attr.h"
++#include "string-list.h"
+ #include "win32/wsl.h"
+ 
+ #define HCAST(type, handle) ((type)(intptr_t)handle)
+@@ -32,7 +32,6 @@
+ void open_in_gdb(void)
+ {
+ 	static struct child_process cp = CHILD_PROCESS_INIT;
+-	extern char *_pgmptr;
+ 
+ 	strvec_pushl(&cp.args, "mintty", "gdb", NULL);
+ 	strvec_pushf(&cp.args, "--pid=%d", getpid());