diff --git a/tools/export/iar.py b/tools/export/iar.py
index 79fc4a2fd3e..5c52a3d1ec4 100644
--- a/tools/export/iar.py
+++ b/tools/export/iar.py
@@ -39,10 +39,11 @@ class IAREmbeddedWorkbench(Exporter):
     def TARGETS(cls):
         if not hasattr(cls, "_targets_supported"):
             cls._targets_supported = []
+            progendef = ProGenDef('iar')
             for target in TARGET_NAMES:
                 try:
-                    if (ProGenDef('iar').is_supported(str(TARGET_MAP[target])) or
-                        ProGenDef('iar').is_supported(TARGET_MAP[target].progen['target'])):
+                    if (progendef.is_supported(str(TARGET_MAP[target])) or
+                        progendef.is_supported(TARGET_MAP[target].progen['target'])):
                         cls._targets_supported.append(target)
                 except AttributeError:
                     # target is not supported yet
diff --git a/tools/export/uvision4.py b/tools/export/uvision4.py
index 03945c17c3b..45d5bb40fce 100644
--- a/tools/export/uvision4.py
+++ b/tools/export/uvision4.py
@@ -39,10 +39,11 @@ class Uvision4(Exporter):
     def TARGETS(cls):
         if not hasattr(cls, "_targets_supported"):
             cls._targets_supported = []
+            progendef = ProGenDef('uvision')
             for target in TARGET_NAMES:
                 try:
-                    if (ProGenDef('uvision').is_supported(str(TARGET_MAP[target])) or
-                        ProGenDef('uvision').is_supported(TARGET_MAP[target].progen['target'])):
+                    if (progendef.is_supported(str(TARGET_MAP[target])) or
+                        progendef.is_supported(TARGET_MAP[target].progen['target'])):
                         cls._targets_supported.append(target)
                 except AttributeError:
                     # target is not supported yet
diff --git a/tools/export/uvision5.py b/tools/export/uvision5.py
index 72e18a97226..6cd7f81439f 100644
--- a/tools/export/uvision5.py
+++ b/tools/export/uvision5.py
@@ -39,10 +39,11 @@ class Uvision5(Exporter):
     def TARGETS(cls):
         if not hasattr(cls, "_targets_supported"):
             cls._targets_supported = []
+            progendef = ProGenDef('uvision5')
             for target in TARGET_NAMES:
                 try:
-                    if (ProGenDef('uvision5').is_supported(str(TARGET_MAP[target])) or
-                        ProGenDef('uvision5').is_supported(TARGET_MAP[target].progen['target'])):
+                    if (progendef.is_supported(str(TARGET_MAP[target])) or
+                        progendef.is_supported(TARGET_MAP[target].progen['target'])):
                         cls._targets_supported.append(target)
                 except AttributeError:
                     # target is not supported yet