diff --git a/include/build_config/SDL_build_config_android.h b/include/build_config/SDL_build_config_android.h
index ad75cc1fb..4e688d0d3 100644
--- a/include/build_config/SDL_build_config_android.h
+++ b/include/build_config/SDL_build_config_android.h
@@ -52,6 +52,7 @@
 #define HAVE_WCHAR_H 1
 
 /* C library functions */
+#define HAVE_LIBC   1
 #define HAVE_DLOPEN 1
 #define HAVE_MALLOC 1
 #define HAVE_CALLOC 1
diff --git a/include/build_config/SDL_build_config_emscripten.h b/include/build_config/SDL_build_config_emscripten.h
index 7fb5294de..40876c395 100644
--- a/include/build_config/SDL_build_config_emscripten.h
+++ b/include/build_config/SDL_build_config_emscripten.h
@@ -55,6 +55,7 @@
 #define HAVE_WCHAR_H 1
 
 /* C library functions */
+#define HAVE_LIBC   1
 #define HAVE_DLOPEN 1
 #define HAVE_MALLOC 1
 #define HAVE_CALLOC 1
diff --git a/include/build_config/SDL_build_config_ios.h b/include/build_config/SDL_build_config_ios.h
index e79ca4ce2..48da88529 100644
--- a/include/build_config/SDL_build_config_ios.h
+++ b/include/build_config/SDL_build_config_ios.h
@@ -44,6 +44,7 @@
 #define HAVE_WCHAR_H 1
 
 /* C library functions */
+#define HAVE_LIBC   1
 #define HAVE_DLOPEN 1
 #define HAVE_MALLOC 1
 #define HAVE_CALLOC 1
diff --git a/include/build_config/SDL_build_config_macos.h b/include/build_config/SDL_build_config_macos.h
index 66bdb5ea4..9eb5830cd 100644
--- a/include/build_config/SDL_build_config_macos.h
+++ b/include/build_config/SDL_build_config_macos.h
@@ -49,6 +49,7 @@
 #define HAVE_WCHAR_H 1
 
 /* C library functions */
+#define HAVE_LIBC   1
 #define HAVE_DLOPEN 1
 #define HAVE_MALLOC 1
 #define HAVE_CALLOC 1
diff --git a/include/build_config/SDL_build_config_windows.h b/include/build_config/SDL_build_config_windows.h
index d2846abc8..52c2df725 100644
--- a/include/build_config/SDL_build_config_windows.h
+++ b/include/build_config/SDL_build_config_windows.h
@@ -112,8 +112,11 @@ typedef unsigned int uintptr_t;
 #endif
 
 /* This can be disabled to avoid C runtime dependencies and manifest requirements */
-#define HAVE_LIBC
-#ifdef HAVE_LIBC
+#ifndef HAVE_LIBC
+#define HAVE_LIBC   1
+#endif
+
+#if HAVE_LIBC
 /* Useful headers */
 #define HAVE_CTYPE_H 1
 #define HAVE_FLOAT_H 1
diff --git a/include/build_config/SDL_build_config_wingdk.h b/include/build_config/SDL_build_config_wingdk.h
index 3730221d9..2f25b597e 100644
--- a/include/build_config/SDL_build_config_wingdk.h
+++ b/include/build_config/SDL_build_config_wingdk.h
@@ -56,8 +56,6 @@
 # define SDL_DISABLE_AVX 1
 #endif
 
-/* This is disabled by default to avoid C runtime dependencies and manifest requirements */
-#ifdef HAVE_LIBC
 /* Useful headers */
 #define HAVE_CTYPE_H 1
 #define HAVE_FLOAT_H 1
@@ -73,6 +71,7 @@
 #define HAVE_WCHAR_H 1
 
 /* C library functions */
+#define HAVE_LIBC   1
 #define HAVE_MALLOC 1
 #define HAVE_CALLOC 1
 #define HAVE_REALLOC 1
@@ -156,11 +155,6 @@
 #define HAVE_TRUNCF 1
 #define HAVE__FSEEKI64 1
 #endif    /* _MSC_VER */
-#else
-#define HAVE_STDARG_H   1
-#define HAVE_STDDEF_H   1
-#define HAVE_STDINT_H   1
-#endif
 
 /* Enable various audio drivers */
 #if defined(HAVE_MMDEVICEAPI_H) && defined(HAVE_AUDIOCLIENT_H)
diff --git a/include/build_config/SDL_build_config_winrt.h b/include/build_config/SDL_build_config_winrt.h
index bb014efe9..08ec512b0 100644
--- a/include/build_config/SDL_build_config_winrt.h
+++ b/include/build_config/SDL_build_config_winrt.h
@@ -71,6 +71,7 @@
 #define HAVE_WCHAR_H 1
 
 /* C library functions */
+#define HAVE_LIBC   1
 #define HAVE_MALLOC 1
 #define HAVE_CALLOC 1
 #define HAVE_REALLOC 1
diff --git a/include/build_config/SDL_build_config_xbox.h b/include/build_config/SDL_build_config_xbox.h
index aecbd3a12..2f0f090fe 100644
--- a/include/build_config/SDL_build_config_xbox.h
+++ b/include/build_config/SDL_build_config_xbox.h
@@ -56,8 +56,6 @@
 # define SDL_DISABLE_AVX 1
 #endif
 
-/* This is disabled by default to avoid C runtime dependencies and manifest requirements */
-#ifdef HAVE_LIBC
 /* Useful headers */
 #define HAVE_CTYPE_H 1
 #define HAVE_FLOAT_H 1
@@ -73,6 +71,7 @@
 #define HAVE_WCHAR_H 1
 
 /* C library functions */
+#define HAVE_LIBC   1
 #define HAVE_MALLOC 1
 #define HAVE_CALLOC 1
 #define HAVE_REALLOC 1
@@ -156,11 +155,6 @@
 #define HAVE_TRUNCF 1
 #define HAVE__FSEEKI64 1
 #endif    /* _MSC_VER */
-#else
-#define HAVE_STDARG_H   1
-#define HAVE_STDDEF_H   1
-#define HAVE_STDINT_H   1
-#endif
 
 /* Enable various audio drivers */
 #if defined(HAVE_MMDEVICEAPI_H) && defined(HAVE_AUDIOCLIENT_H)