diff --git a/src/3rdparty/double-conversion/include/double-conversion/utils.h b/src/3rdparty/double-conversion/include/double-conversion/utils.h

index 70e697ca00..9be294a2d0 100644

--- a/src/3rdparty/double-conversion/include/double-conversion/utils.h

+++ b/src/3rdparty/double-conversion/include/double-conversion/utils.h

@@ -102,6 +102,7 @@ int main(int argc, char** argv) {

     defined(__AARCH64EL__) || defined(__aarch64__) || defined(__AARCH64EB__) || \

     defined(__riscv) || \

     defined(__or1k__) || defined(__arc__) || \

+    defined(__loongarch64) || \

     defined(__EMSCRIPTEN__)

 #define DOUBLE_CONVERSION_CORRECT_DOUBLE_OPERATIONS 1

 #elif defined(__mc68000__) || \

diff --git a/src/corelib/global/archdetect.cpp b/src/corelib/global/archdetect.cpp

index 1d00b7f5a5..74f3c8fc86 100644

--- a/src/corelib/global/archdetect.cpp

+++ b/src/corelib/global/archdetect.cpp

@@ -59,6 +59,8 @@

 #  define ARCH_PROCESSOR "x86_64"

 #elif defined(Q_PROCESSOR_IA64)

 #  define ARCH_PROCESSOR "ia64"

+#elif defined(Q_PROCESSOR_LOONGARCH_64)

+#  define ARCH_PROCESSOR "loongarch64"

 #elif defined(Q_PROCESSOR_MIPS_64)

 #  define ARCH_PROCESSOR "mips64"

 #elif defined(Q_PROCESSOR_MIPS)

diff --git a/src/corelib/global/qprocessordetection.h b/src/corelib/global/qprocessordetection.h

index 8d65720850..3a4271e82f 100644

--- a/src/corelib/global/qprocessordetection.h

+++ b/src/corelib/global/qprocessordetection.h

@@ -223,6 +223,17 @@

 #  define Q_PROCESSOR_WORDSIZE   8

 // Q_BYTE_ORDER not defined, use endianness auto-detection

+/*

+    LoongArch family, supported variant: lp64d ABI

+

+    LoongArch is little-endian.

+*/

+

+#elif defined(__loongarch64)

+   #define Q_PROCESSOR_LOONGARCH

+   #define Q_PROCESSOR_LOONGARCH_64

+   #define Q_BYTE_ORDER Q_LITTLE_ENDIAN

+

 /*

     MIPS family, known revisions: I, II, III, IV, 32, 64