diff --git a/cmake/ConfigureChecks.cmake b/cmake/ConfigureChecks.cmake
index 052a39172..1444361e9 100644
--- a/cmake/ConfigureChecks.cmake
+++ b/cmake/ConfigureChecks.cmake
@@ -72,6 +72,7 @@ CHECK_CXX_SYMBOL_EXISTS(wcsdup wchar.h HAVE_WCSDUP)
 CHECK_CXX_SYMBOL_EXISTS(wcslcpy wchar.h HAVE_WCSLCPY)
 CHECK_CXX_SYMBOL_EXISTS(wcsncasecmp wchar.h HAVE_WCSNCASECMP)
 CHECK_CXX_SYMBOL_EXISTS(wcsndup wchar.h HAVE_WCSNDUP)
+CHECK_CXX_SYMBOL_EXISTS(wcstod_l wchar.h HAVE_WCSTOD_L)
 
 CHECK_CXX_SYMBOL_EXISTS(_sys_errs stdlib.h HAVE__SYS__ERRS)
 
diff --git a/configure.ac b/configure.ac
index ebaceb1de..7070799ff 100644
--- a/configure.ac
+++ b/configure.ac
@@ -316,6 +316,7 @@ AC_STRUCT_DIRENT_D_TYPE
 #
 
 AC_CHECK_FUNCS( wcsndup )
+AC_CHECK_FUNCS( wcstod_l )
 AC_CHECK_FUNCS( futimes )
 AC_CHECK_FUNCS( wcslcpy lrand48_r killpg )
 AC_CHECK_FUNCS( backtrace_symbols getifaddrs )
diff --git a/src/fallback.cpp b/src/fallback.cpp
index 42a9d62d2..d7e4e508e 100644
--- a/src/fallback.cpp
+++ b/src/fallback.cpp
@@ -388,3 +388,18 @@ int flock(int fd, int op) {
 }
 
 #endif  // HAVE_FLOCK
+
+#ifndef HAVE_WCSTOD_L
+// musl doesn't feature wcstod_l,
+// so we just wrap wcstod.
+double wcstod_l(const wchar_t *enptr, wchar_t **endptr, locale_t loc) {
+    char *saved_locale = strdup(setlocale(LC_NUMERIC, NULL));
+    // Yes, this is hardcoded to use the "C" locale.
+    // That's the only thing we need, and uselocale(loc) broke in my testing.
+    setlocale(LC_NUMERIC, "C");
+    double ret = wcstod(enptr, endptr);
+    setlocale(LC_NUMERIC, saved_locale);
+    free(saved_locale);
+    return ret;
+}
+#endif // defined(wcstod_l)
diff --git a/src/fallback.h b/src/fallback.h
index 44ddee398..b0680de05 100644
--- a/src/fallback.h
+++ b/src/fallback.h
@@ -198,3 +198,7 @@ int flock(int fd, int op);
 #endif
 
 #endif
+
+#ifndef wcstod_l
+double wcstod_l(const wchar_t *enptr, wchar_t **endptr, locale_t loc);
+#endif