diff --git a/src/arm/Gglobal.c b/src/arm/Gglobal.c
index ce692f7b..b3d3a6d8 100644
--- a/src/arm/Gglobal.c
+++ b/src/arm/Gglobal.c
@@ -25,7 +25,7 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
 #include "unwind_i.h"
 #include "dwarf_i.h"
 
-HIDDEN pthread_mutex_t arm_lock = PTHREAD_MUTEX_INITIALIZER;
+HIDDEN define_lock (arm_lock);
 HIDDEN int tdep_init_done;
 
 /* Unwinding methods to use. See UNW_METHOD_ enums */
diff --git a/src/hppa/Gglobal.c b/src/hppa/Gglobal.c
index 849b8e55..2f1b5931 100644
--- a/src/hppa/Gglobal.c
+++ b/src/hppa/Gglobal.c
@@ -25,7 +25,7 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
 
 #include "unwind_i.h"
 
-HIDDEN pthread_mutex_t hppa_lock = PTHREAD_MUTEX_INITIALIZER;
+HIDDEN define_lock (hppa_lock);
 HIDDEN int tdep_init_done;
 
 HIDDEN void
diff --git a/src/mi/dyn-register.c b/src/mi/dyn-register.c
index a62d696e..c28954a2 100644
--- a/src/mi/dyn-register.c
+++ b/src/mi/dyn-register.c
@@ -25,7 +25,7 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
 
 #include "libunwind_i.h"
 
-HIDDEN pthread_mutex_t _U_dyn_info_list_lock = PTHREAD_MUTEX_INITIALIZER;
+HIDDEN define_lock (_U_dyn_info_list_lock);
 
 void
 _U_dyn_register (unw_dyn_info_t *di)
diff --git a/src/mips/Gglobal.c b/src/mips/Gglobal.c
index a29583f7..f2231573 100644
--- a/src/mips/Gglobal.c
+++ b/src/mips/Gglobal.c
@@ -25,7 +25,7 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
 #include "unwind_i.h"
 #include "dwarf_i.h"
 
-HIDDEN pthread_mutex_t mips_lock = PTHREAD_MUTEX_INITIALIZER;
+HIDDEN define_lock (mips_lock);
 HIDDEN int tdep_init_done;
 
 HIDDEN void
diff --git a/src/ppc32/Gglobal.c b/src/ppc32/Gglobal.c
index 6af97727..e817e094 100644
--- a/src/ppc32/Gglobal.c
+++ b/src/ppc32/Gglobal.c
@@ -28,7 +28,7 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
 #include "unwind_i.h"
 #include "dwarf_i.h"
 
-HIDDEN pthread_mutex_t ppc32_lock = PTHREAD_MUTEX_INITIALIZER;
+HIDDEN define_lock (ppc32_lock);
 HIDDEN int tdep_init_done;
 
 /* The API register numbers are exactly the same as the .eh_frame
diff --git a/src/ppc64/Gglobal.c b/src/ppc64/Gglobal.c
index 7c5dfc1b..8b46c3d8 100644
--- a/src/ppc64/Gglobal.c
+++ b/src/ppc64/Gglobal.c
@@ -28,7 +28,7 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
 #include "unwind_i.h"
 #include "dwarf_i.h"
 
-HIDDEN pthread_mutex_t ppc64_lock = PTHREAD_MUTEX_INITIALIZER;
+HIDDEN define_lock (ppc64_lock);
 HIDDEN int tdep_init_done;
 
 /* The API register numbers are exactly the same as the .eh_frame
diff --git a/src/x86/Gglobal.c b/src/x86/Gglobal.c
index 24b388a4..033a788b 100644
--- a/src/x86/Gglobal.c
+++ b/src/x86/Gglobal.c
@@ -26,7 +26,7 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
 #include "unwind_i.h"
 #include "dwarf_i.h"
 
-HIDDEN pthread_mutex_t x86_lock = PTHREAD_MUTEX_INITIALIZER;
+HIDDEN define_lock (x86_lock);
 HIDDEN int tdep_init_done;
 
 /* See comments for svr4_dbx_register_map[] in gcc/config/i386/i386.c.  */
diff --git a/src/x86_64/Gglobal.c b/src/x86_64/Gglobal.c
index 37fe6b0b..cf1e3746 100644
--- a/src/x86_64/Gglobal.c
+++ b/src/x86_64/Gglobal.c
@@ -29,7 +29,7 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
 #include "unwind_i.h"
 #include "dwarf_i.h"
 
-HIDDEN pthread_mutex_t x86_64_lock = PTHREAD_MUTEX_INITIALIZER;
+HIDDEN define_lock (x86_64_lock);
 HIDDEN int tdep_init_done;
 
 /* See comments for svr4_dbx_register_map[] in gcc/config/i386/i386.c.  */
diff --git a/src/x86_64/Gtrace.c b/src/x86_64/Gtrace.c
index 446610cb..89453a88 100644
--- a/src/x86_64/Gtrace.c
+++ b/src/x86_64/Gtrace.c
@@ -45,7 +45,7 @@ typedef struct
 } unw_trace_cache_t;
 
 static const unw_tdep_frame_t empty_frame = { 0, UNW_X86_64_FRAME_OTHER, -1, -1, 0, -1, -1 };
-static pthread_mutex_t trace_init_lock = PTHREAD_MUTEX_INITIALIZER;
+static define_lock (trace_init_lock);
 static pthread_once_t trace_cache_once = PTHREAD_ONCE_INIT;
 static sig_atomic_t trace_cache_once_happen;
 static pthread_key_t trace_cache_key;