diff --git a/libunwind/src/UnwindCursor.hpp b/libunwind/src/UnwindCursor.hpp
--- a/libunwind/src/UnwindCursor.hpp
+++ b/libunwind/src/UnwindCursor.hpp
@@ -2106,6 +2106,7 @@
           // using dlopen().
           const char libcxxabi[] = "libc++abi.a(libc++abi.so.1)";
           void *libHandle;
+          int saveErrno = errno;
           libHandle = dlopen(libcxxabi, RTLD_MEMBER | RTLD_NOW);
           if (libHandle == NULL) {
             _LIBUNWIND_TRACE_UNWINDING("dlopen() failed with errno=%d\n",
@@ -2119,6 +2120,7 @@
             assert(0 && "dlsym() failed");
           }
           dlclose(libHandle);
+          errno = saveErrno;
         }
       }
       xlcPersonalityV0InitLock.unlock();