diff --git a/mod_dub/tts_vendor_parser.cpp b/mod_dub/tts_vendor_parser.cpp
index 48a47d4..2655ff4 100644
--- a/mod_dub/tts_vendor_parser.cpp
+++ b/mod_dub/tts_vendor_parser.cpp
@@ -378,7 +378,10 @@ switch_status_t playht_parse_text(const std::map<std::string, std::string>& para
     cJSON_AddStringToObject(jResult, "quality", quality.c_str());
   }
   if (!speed.empty()) {
-    cJSON_AddNumberToObject(jResult, "speed", atoi(speed.c_str()));
+      double val = strtod(speed.c_str(), NULL);
+      if (val != 0.0) {
+        cJSON_AddNumberToObject(jResult, "speed", val);
+      }
   }
   if (!seed.empty()) {
     cJSON_AddNumberToObject(jResult, "seed", atoi(seed.c_str()));
diff --git a/mod_playht_tts/playht_glue.cpp b/mod_playht_tts/playht_glue.cpp
index d814016..c5cad47 100644
--- a/mod_playht_tts/playht_glue.cpp
+++ b/mod_playht_tts/playht_glue.cpp
@@ -774,7 +774,10 @@ extern "C" {
       cJSON_AddStringToObject(jResult, "quality", p->quality);
     }
     if (p->speed) {
-      cJSON_AddNumberToObject(jResult, "speed", atoi(p->speed));
+      double val = strtod(p->speed, NULL);
+      if (val != 0.0) {
+        cJSON_AddNumberToObject(jResult, "speed", val);
+      }
     }
     if (p->seed) {
       cJSON_AddNumberToObject(jResult, "seed", atoi(p->seed));