diff --git a/configure.ac b/configure.ac
index cd6ab67..be494c9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -22,7 +22,7 @@ AX_CHECK_COMPILE_FLAG([-std=gnu99], [CFLAGS="$CFLAGS -std=gnu99"], [
 	AX_CHECK_COMPILE_FLAG([-std=c99], [CFLAGS="$CFLAGS -std=c99"])
 ])
 AC_CONFIG_HEADERS([libpkgconf/config.h])
-AC_CHECK_FUNCS([strlcpy strlcat strndup cygwin_conv_path])
+AC_CHECK_FUNCS([strlcpy strlcat strndup])
 AC_CHECK_HEADERS([sys/stat.h])
 AM_INIT_AUTOMAKE([foreign dist-xz subdir-objects])
 AM_SILENT_RULES([yes])
diff --git a/doc/libpkgconf-path.rst b/doc/libpkgconf-path.rst
index 6d39b3a..e923f61 100644
--- a/doc/libpkgconf-path.rst
+++ b/doc/libpkgconf-path.rst
@@ -55,7 +55,7 @@ variables.
 
 .. c:function:: bool pkgconf_path_relocate(char *buf, size_t buflen)
 
-   Relocates a path, possibly calling normpath() or cygwin_conv_path() on it.
+   Relocates a path, possibly calling normpath() on it.
 
    :param char* buf: The path to relocate.
    :param size_t buflen: The buffer length the path is contained in.
diff --git a/libpkgconf/config.h.meson b/libpkgconf/config.h.meson
index c0e97a6..09279da 100644
--- a/libpkgconf/config.h.meson
+++ b/libpkgconf/config.h.meson
@@ -1,8 +1,5 @@
 /* libpkgconf/config.h.in.  Generated from configure.ac by autoheader.  */
 
-/* Define to 1 if you have the `cygwin_conv_path' function. */
-#mesondefine HAVE_CYGWIN_CONV_PATH
-
 /* Define to 1 if you have the `strlcat' function. */
 #mesondefine HAVE_STRLCAT
 
diff --git a/libpkgconf/path.c b/libpkgconf/path.c
index 8e23c44..89d2ce0 100644
--- a/libpkgconf/path.c
+++ b/libpkgconf/path.c
@@ -17,10 +17,6 @@
 #include <libpkgconf/stdinc.h>
 #include <libpkgconf/libpkgconf.h>
 
-#ifdef HAVE_CYGWIN_CONV_PATH
-# include <sys/cygwin.h>
-#endif
-
 #if defined(HAVE_SYS_STAT_H) && ! defined(_WIN32)
 # include <sys/stat.h>
 # define PKGCONF_CACHE_INODES
@@ -306,7 +302,7 @@ normpath(const char *path)
  *
  * .. c:function:: bool pkgconf_path_relocate(char *buf, size_t buflen)
  *
- *    Relocates a path, possibly calling normpath() or cygwin_conv_path() on it.
+ *    Relocates a path, possibly calling normpath() on it.
  *
  *    :param char* buf: The path to relocate.
  *    :param size_t buflen: The buffer length the path is contained in.
@@ -320,25 +316,6 @@ pkgconf_path_relocate(char *buf, size_t buflen)
 	char *ti;
 #endif
 
-#ifdef HAVE_CYGWIN_CONV_PATH
-	/*
-	 * If we are on Cygwin or MSYS, then we want to convert the virtual path
-	 * to a real DOS path, using cygwin_conv_path().
-	 */
-	ssize_t size;
-	char *tmpbuf;
-
-	size = cygwin_conv_path(CCP_POSIX_TO_WIN_A, buf, NULL, 0);
-	if (size < 0 || (size_t) size > buflen)
-		return false;
-
-	tmpbuf = malloc(size);
-	if (cygwin_conv_path(CCP_POSIX_TO_WIN_A, buf, tmpbuf, size))
-		return false;
-
-	pkgconf_strlcpy(buf, tmpbuf, buflen);
-	free(tmpbuf);
-#else
 	char *tmpbuf;
 
 	if ((tmpbuf = normpath(buf)) != NULL)
@@ -353,7 +330,6 @@ pkgconf_path_relocate(char *buf, size_t buflen)
 		pkgconf_strlcpy(buf, tmpbuf, buflen);
 		free(tmpbuf);
 	}
-#endif
 
 #ifdef _WIN32
 	/*
diff --git a/meson.build b/meson.build
index e7822b8..991598a 100644
--- a/meson.build
+++ b/meson.build
@@ -10,7 +10,6 @@ cc = meson.get_compiler('c')
 cdata = configuration_data()
 
 check_functions = [
-  ['HAVE_CYGWIN_CONV_PATH', 'cygwin_conv_path', 'sys/cygwin.h'],
   ['HAVE_STRLCAT', 'strlcat', 'string.h'],
   ['HAVE_STRLCPY', 'strlcpy', 'string.h'],
   ['HAVE_STRNDUP', 'strndup', 'string.h'],
diff --git a/tests/test_env.sh.in b/tests/test_env.sh.in
index 17ee1f5..e0ce042 100644
--- a/tests/test_env.sh.in
+++ b/tests/test_env.sh.in
@@ -26,7 +26,6 @@ LIBRARY_PATH_ENV="LIBRARY_PATH"
 PATH_SEP=":"
 SYSROOT_DIR="${selfdir}/test"
 case "$(uname -s)" in
-Msys|CYGWIN*) PATH_SEP=";";;
 Haiku) LIBRARY_PATH_ENV="BELIBRARIES";;
 esac