diff --git a/android/external/arm64-v8a/Makefile b/android/external/arm64-v8a/Makefile
index a27a333..02a2908 100644
--- a/android/external/arm64-v8a/Makefile
+++ b/android/external/arm64-v8a/Makefile
@@ -140,6 +140,7 @@ libetpan-build: libetpan/Makefile
 
 libetpan-clean:
 	rm -rf libetpan
+	rm -rf libetpan.src.stamp
 
 #------------------------------------------------------------------------------#
 # uuid
diff --git a/android/external/armeabi-v7a/Makefile b/android/external/armeabi-v7a/Makefile
index 58678a4..dcc0873 100644
--- a/android/external/armeabi-v7a/Makefile
+++ b/android/external/armeabi-v7a/Makefile
@@ -140,6 +140,7 @@ libetpan-build: libetpan/Makefile
 
 libetpan-clean:
 	rm -rf libetpan
+	rm -rf libetpan.src.stamp
 
 #------------------------------------------------------------------------------#
 # uuid
diff --git a/android/external/x86/Makefile b/android/external/x86/Makefile
index 317400a..05a48bf 100644
--- a/android/external/x86/Makefile
+++ b/android/external/x86/Makefile
@@ -140,6 +140,7 @@ libetpan-build: libetpan/Makefile
 
 libetpan-clean:
 	rm -rf libetpan
+	rm -rf libetpan.src.stamp
 
 #------------------------------------------------------------------------------#
 # uuid
diff --git a/android/external/x86_64/Makefile b/android/external/x86_64/Makefile
index 73b43da..d78b54a 100644
--- a/android/external/x86_64/Makefile
+++ b/android/external/x86_64/Makefile
@@ -140,6 +140,7 @@ libetpan-build: libetpan/Makefile
 
 libetpan-clean:
 	rm -rf libetpan
+	rm -rf libetpan.src.stamp
 
 #------------------------------------------------------------------------------#
 # uuid