diff --git a/src/3rdparty/double-conversion/include/double-conversion/utils.h b/src/3rdparty/double-conversion/include/double-conversion/utils.h
index 70e697ca..9be294a2 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 1d00b7f5..74f3c8fc 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 8d657208..69f84a15 100644
--- a/src/corelib/global/qprocessordetection.h
+++ b/src/corelib/global/qprocessordetection.h
@@ -223,6 +223,10 @@
 #  define Q_PROCESSOR_WORDSIZE   8
 // Q_BYTE_ORDER not defined, use endianness auto-detection
 
+#elif defined(__loongarch64)
+#    define Q_PROCESSOR_LOONGARCH_64
+#    define Q_PROCESSOR_WORDSIZE 8
+
 /*
     MIPS family, known revisions: I, II, III, IV, 32, 64