diff --git a/Source/CTest/Curl/CMake/CurlTests.c b/Source/CTest/Curl/CMake/CurlTests.c
index fed389457f..61278ea1f1 100644
--- a/Source/CTest/Curl/CMake/CurlTests.c
+++ b/Source/CTest/Curl/CMake/CurlTests.c
@@ -521,3 +521,15 @@ main () {
     return 0;
 }
 #endif
+#ifdef HAVE_LONG_LONG_CONSTANT
+int main()
+{
+  long long c = 0x8000000000000000LL;
+  long long k = 0x7FFFFFFFFFFFFFFFLL;
+  if ( c == 0x8000000000000000LL && c != k )
+    {
+    return 0;
+    }
+  return 1;
+}
+#endif
diff --git a/Source/CTest/Curl/CMakeLists.txt b/Source/CTest/Curl/CMakeLists.txt
index 3b252fddb8..2cfc761b2d 100644
--- a/Source/CTest/Curl/CMakeLists.txt
+++ b/Source/CTest/Curl/CMakeLists.txt
@@ -446,6 +446,7 @@ ENDIF(HAVE_FILE_OFFSET_BITS)
 FOREACH(CURL_TEST 
     HAVE_GLIBC_STRERROR_R
     HAVE_POSIX_STRERROR_R
+    HAVE_LONG_LONG_CONSTANT
     )
   CURL_INTERNAL_TEST_RUN(${CURL_TEST})
 ENDFOREACH(CURL_TEST)
diff --git a/Source/CTest/Curl/config.h.in b/Source/CTest/Curl/config.h.in
index 5b554cc680..c5fe65236c 100644
--- a/Source/CTest/Curl/config.h.in
+++ b/Source/CTest/Curl/config.h.in
@@ -504,3 +504,6 @@
 
 /* the signed version of size_t */
 #cmakedefine ssize_t ${ssize_t}
+
+/* define if the compiler supports number 0x3627676LL */
+#cmakedefine HAVE_LONG_LONG_CONSTANT ${HAVE_LONG_LONG_CONSTANT}
diff --git a/Source/CTest/Curl/strtoofft.c b/Source/CTest/Curl/strtoofft.c
index 1bcfb1af4f..e2b02c46a8 100644
--- a/Source/CTest/Curl/strtoofft.c
+++ b/Source/CTest/Curl/strtoofft.c
@@ -111,10 +111,17 @@ curlx_strtoll(const char *nptr, char **endptr, int base)
     }
   }
   else {
+#ifdef HAVE_LONG_LONG_CONSTANT
+    if (is_negative)
+      value = 0x8000000000000000LL;
+    else
+      value = 0x7FFFFFFFFFFFFFFFLL;
+#else
     if (is_negative)
       value = 0x8000000000000000L;
     else
       value = 0x7FFFFFFFFFFFFFFFL;
+#endif
 
     errno = ERANGE;
   }