diff --git a/VERSION b/VERSION
index bcc565f2..de1a208d 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.11.18
+1.11.19
diff --git a/src/metkit/mars/TypeParam.cc b/src/metkit/mars/TypeParam.cc
index f417f221..aa18eaac 100644
--- a/src/metkit/mars/TypeParam.cc
+++ b/src/metkit/mars/TypeParam.cc
@@ -359,6 +359,7 @@ std::string Rule::lookup(const MarsExpandContext& ctx, const std::string & s, bo
     if (!paramid.empty()) {
         return paramid;
     }
+
     return metkit::mars::MarsLanguage::bestMatch(c, s, defaultValues_, fail, false, defaultMapping_);
 }
 
@@ -436,7 +437,7 @@ static void init() {
 
     std::set<std::string> shortnames;
     std::set<std::string> associatedIDs;
-
+    
     const eckit::Value pc = eckit::YAMLParser::decodeFile(LibMetkit::shortnameContextYamlFile());
     ASSERT(pc.isList());
 
@@ -446,11 +447,10 @@ static void init() {
 
     for (size_t i=0; i < keys.size(); i++) {
         auto el = ids.element(keys[i]);
-        ASSERT(el.size() > 0);
-        auto val = el[0];
-
-        if (shortnames.find(val) != shortnames.end()) {
-            associatedIDs.emplace(keys[i]);
+        for (size_t j=0; j < el.size(); j++) {
+            if (shortnames.find(el[j]) != shortnames.end()) {
+                associatedIDs.emplace(keys[i]);
+            }
         }
     }
 
diff --git a/tests/test_expand.cc b/tests/test_expand.cc
index 9480e06c..1b25fdbf 100644
--- a/tests/test_expand.cc
+++ b/tests/test_expand.cc
@@ -377,6 +377,23 @@ CASE( "test_metkit_expand_param" ) {
         EXPECT_EQUAL(params[4], "164");
         EXPECT_EQUAL(params[5], "228");
     }
+    {
+        const char* text = "retrieve,class=od,expver=1,stream=msmm,date=-1,time=0000,type=em,levtype=sfc,step=24,param=e";
+        MarsRequest r = MarsRequest::parse(text);
+        auto params = r.values("param");
+        EXPECT_EQUAL(params.size(), 1);
+
+        EXPECT_EQUAL(params[0], "172182");
+    }
+    {
+        const char* text = "retrieve,class=od,expver=1,stream=msmm,date=-1,time=0000,type=em,levtype=sfc,step=24,param=e/erate";
+        MarsRequest r = MarsRequest::parse(text);
+        auto params = r.values("param");
+        EXPECT_EQUAL(params.size(), 2);
+
+        EXPECT_EQUAL(params[0], "172182");
+        EXPECT_EQUAL(params[1], "172182");
+    }
 }
 
 //-----------------------------------------------------------------------------