diff -Naur source/i18n/decimfmt.cpp source.serenity/i18n/decimfmt.cpp
--- source/i18n/decimfmt.cpp	2021-05-11 18:48:28.172956656 +0200
+++ source.serenity/i18n/decimfmt.cpp	2021-05-11 18:47:42.222070235 +0200
@@ -9,7 +9,7 @@
 // Helpful in toString methods and elsewhere.
 #define UNISTR_FROM_STRING_EXPLICIT
 
-#include <cmath>
+#include <math.h>
 #include <cstdlib>
 #include <stdlib.h>
 #include "unicode/errorcode.h"
diff -Naur source/i18n/number_decimalquantity.cpp source.serenity/i18n/number_decimalquantity.cpp
--- source/i18n/number_decimalquantity.cpp	2021-05-11 18:48:28.172956656 +0200
+++ source.serenity/i18n/number_decimalquantity.cpp	2021-05-11 18:48:02.715798916 +0200
@@ -6,7 +6,7 @@
 #if !UCONFIG_NO_FORMATTING
 
 #include <cstdlib>
-#include <cmath>
+#include <math.h>
 #include <limits>
 #include <stdlib.h>
 
diff -Naur source/i18n/number_utils.cpp source.serenity/i18n/number_utils.cpp
--- source/i18n/number_utils.cpp	2021-05-11 18:48:28.172956656 +0200
+++ source.serenity/i18n/number_utils.cpp	2021-05-11 18:47:22.298352531 +0200
@@ -10,7 +10,7 @@
 #define UNISTR_FROM_STRING_EXPLICIT
 
 #include <stdlib.h>
-#include <cmath>
+#include <math.h>
 #include "number_decnum.h"
 #include "number_types.h"
 #include "number_utils.h"
diff -Naur source/i18n/reldatefmt.cpp source.serenity/i18n/reldatefmt.cpp
--- source/i18n/reldatefmt.cpp	2021-05-11 18:48:28.172956656 +0200
+++ source.serenity/i18n/reldatefmt.cpp	2021-05-11 18:46:45.380973593 +0200
@@ -14,7 +14,7 @@
 
 #if !UCONFIG_NO_FORMATTING && !UCONFIG_NO_BREAK_ITERATION
 
-#include <cmath>
+#include <math.h>
 #include <functional>
 #include "unicode/dtfmtsym.h"
 #include "unicode/ucasemap.h"