diff --git a/core/org.eclipse.cdt.core.native/native_src/Makefile b/core/org.eclipse.cdt.core.native/native_src/Makefile
index 8ba1b06f230..c6b99559582 100644
--- a/core/org.eclipse.cdt.core.native/native_src/Makefile
+++ b/core/org.eclipse.cdt.core.native/native_src/Makefile
@@ -75,8 +75,8 @@ WIN_TO_SIGN=$(OS_DIR_WIN32_X86_64)/starter.exe \
 	$(OS_DIR_WIN32_X86_64)/pty.dll
 production: $(MAC_TO_SIGN) $(WIN_TO_SIGN)
 	$(foreach tosign,$(MAC_TO_SIGN) $(WIN_TO_SIGN),mv $(tosign) $(tosign)-unsigned &&) true
-	$(foreach tosign,$(MAC_TO_SIGN),curl -o $(tosign) -F file=@$(tosign)-unsigned https://cbi.eclipse.org/macos/codesign/sign &&) true
-	$(foreach tosign,$(WIN_TO_SIGN),curl -o $(tosign) -F file=@$(tosign)-unsigned https://cbi.eclipse.org/authenticode/sign   &&) true
+	$(foreach tosign,$(MAC_TO_SIGN),curl -f --silent --show-error -o $(tosign) -F file=@$(tosign)-unsigned https://cbi.eclipse.org/macos/codesign/sign &&) true
+	$(foreach tosign,$(WIN_TO_SIGN),curl -f --silent --show-error -o $(tosign) -F file=@$(tosign)-unsigned https://cbi.eclipse.org/authenticode/sign   &&) true
 	$(foreach tosign,$(MAC_TO_SIGN) $(WIN_TO_SIGN),rm $(tosign)-unsigned &&) true
 
 
diff --git a/native/org.eclipse.cdt.native.serial/native_src/Makefile b/native/org.eclipse.cdt.native.serial/native_src/Makefile
index a04f09bb394..bdaecb5e19e 100644
--- a/native/org.eclipse.cdt.native.serial/native_src/Makefile
+++ b/native/org.eclipse.cdt.native.serial/native_src/Makefile
@@ -51,8 +51,8 @@ MAC_TO_SIGN=$(OS_DIR)/macosx/x86_64/libserial.jnilib
 WIN_TO_SIGN=$(OS_DIR)/win32/x86_64/serial.dll
 production: $(MAC_TO_SIGN) $(WIN_TO_SIGN)
 	$(foreach tosign,$(MAC_TO_SIGN) $(WIN_TO_SIGN),mv $(tosign) $(tosign)-unsigned &&) true
-	$(foreach tosign,$(MAC_TO_SIGN),curl -o $(tosign) -F file=@$(tosign)-unsigned https://cbi.eclipse.org/macos/codesign/sign &&) true
-	$(foreach tosign,$(WIN_TO_SIGN),curl -o $(tosign) -F file=@$(tosign)-unsigned https://cbi.eclipse.org/authenticode/sign   &&) true
+	$(foreach tosign,$(MAC_TO_SIGN),curl -f --silent --show-error -o $(tosign) -F file=@$(tosign)-unsigned https://cbi.eclipse.org/macos/codesign/sign &&) true
+	$(foreach tosign,$(WIN_TO_SIGN),curl -f --silent --show-error -o $(tosign) -F file=@$(tosign)-unsigned https://cbi.eclipse.org/authenticode/sign   &&) true
 	$(foreach tosign,$(MAC_TO_SIGN) $(WIN_TO_SIGN),rm $(tosign)-unsigned &&) true