diff --git a/.travis.yml b/.travis.yml
index 8d82629..7223075 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -106,6 +106,7 @@ before_install:
         printf "\n\e[33;1mBuilding multi-stm-erskytx-aetr-inv-v$MULTI_VERSION.bin\e[0m";
         exitcode=0;
         opt_enable CHECK_FOR_BOOTLOADER;
+        opt_disable ENABLE_PPM;
         opt_enable $ALL_PROTOCOLS;
         opt_enable MULTI_STATUS;
         opt_disable MULTI_TELEMETRY;
@@ -173,6 +174,8 @@ before_install:
         exitcode=$((exitcode+$?));
         mv build/Multiprotocol.ino.bin ./binaries/multi-stm-opentx-reta-noinv-v$MULTI_VERSION.bin;
         printf "\n\e[33;1mBuilding multi-stm-ppm-aetr-noinv-v$MULTI_VERSION.bin\e[0m";
+        opt_enable ENABLE_PPM;
+        opt_disable ENABLE_SERIAL;
         opt_replace RETA AETR;
         opt_disable MULTI_STATUS;
         opt_disable MULTI_TELEMETRY;
@@ -238,6 +241,7 @@ before_install:
     elif [[ "$BOARD" == "multi4in1:STM32F1:multi5in1t18int" ]]; then
       buildReleaseFiles(){
         printf "\n\e[33;1mBuilding multi-t18int-opentx-aetr-noinv-v$MULTI_VERSION.bin\e[0m";
+        opt_disable ENABLE_PPM;
         opt_disable INVERT_TELEMETRY;
         exitcode=0;
         buildMulti;