diff --git a/mingw-w64-crt/lib-common/api-ms-win-crt-convert-l1-1-0.def b/mingw-w64-crt/lib-common/api-ms-win-crt-convert-l1-1-0.def
index f700bb9..b59b1c0 100644
--- a/mingw-w64-crt/lib-common/api-ms-win-crt-convert-l1-1-0.def
+++ b/mingw-w64-crt/lib-common/api-ms-win-crt-convert-l1-1-0.def
@@ -106,7 +106,8 @@
 strtof
 strtoimax
 strtol
-strtold
+; Can't use long double functions from the CRT on x86
+F_ARM_ANY(strtold)
 strtoll
 strtoul
 strtoull
@@ -119,7 +120,8 @@
 wcstof
 wcstoimax
 wcstol
-wcstold
+; Can't use long double functions from the CRT on x86
+F_ARM_ANY(wcstold)
 wcstoll
 wcstombs
 wcstombs_s
diff --git a/mingw-w64-crt/lib-common/ucrtbase.def.in b/mingw-w64-crt/lib-common/ucrtbase.def.in
index a2254bc..7d35e42 100644
--- a/mingw-w64-crt/lib-common/ucrtbase.def.in
+++ b/mingw-w64-crt/lib-common/ucrtbase.def.in
@@ -2573,7 +2573,8 @@
 strtok
 strtok_s
 strtol
-strtold
+; Can't use long double functions from the CRT on x86
+F_ARM_ANY(strtold)
 strtoll
 strtoul
 strtoull
@@ -2637,7 +2638,8 @@
 wcstok
 wcstok_s
 wcstol
-wcstold
+; Can't use long double functions from the CRT on x86
+F_ARM_ANY(wcstold)
 wcstoll
 wcstombs
 wcstombs_s