diff --git a/scram-tools.file/tools/gcc/gcc-cxxcompiler.xml b/scram-tools.file/tools/gcc/gcc-cxxcompiler.xml
index d51ffbe705e..1212df04882 100644
--- a/scram-tools.file/tools/gcc/gcc-cxxcompiler.xml
+++ b/scram-tools.file/tools/gcc/gcc-cxxcompiler.xml
@@ -9,7 +9,7 @@
     <flags CXXFLAGS="-Werror=overlength-strings -Wno-vla @GCC_CXXFLAGS@"/>
     <flags CXXFLAGS="-felide-constructors -fmessage-length=0"/>
     <flags CXXFLAGS="-Wall -Wno-non-template-friend -Wno-long-long -Wreturn-type"/>
-    <flags CXXFLAGS="-Wextra -Wpessimizing-move -Wclass-memaccess"/>
+    <flags CXXFLAGS="-Wextra -Wpessimizing-move -Wclass-memaccess -Wconversion"/>
     <flags CXXFLAGS="-Wno-cast-function-type -Wno-unused-but-set-parameter -Wno-ignored-qualifiers -Wno-deprecated-copy -Wno-unused-parameter"/>
     <flags CXXFLAGS="-Wunused -Wparentheses -Wno-deprecated -Werror=return-type"/>
     <flags CXXFLAGS="-Werror=missing-braces -Werror=unused-value"/>