diff --git a/Sources/Plasma/CoreLib/plFormat.cpp b/Sources/Plasma/CoreLib/plFormat.cpp
index b7554598..8122166f 100644
--- a/Sources/Plasma/CoreLib/plFormat.cpp
+++ b/Sources/Plasma/CoreLib/plFormat.cpp
@@ -406,7 +406,7 @@ PL_FORMAT_IMPL(double)
     size_t end = 0;
 
     format_buffer[end++] = '%';
-    if (format.fPrecision) {
+    if (format.fPrecision >= 0) {
         int count = snprintf(format_buffer + end, arrsize(format_buffer) - end,
                              ".%d", format.fPrecision);
 
diff --git a/Sources/Plasma/CoreLib/plFormat.h b/Sources/Plasma/CoreLib/plFormat.h
index a3901b01..add69600 100644
--- a/Sources/Plasma/CoreLib/plFormat.h
+++ b/Sources/Plasma/CoreLib/plFormat.h
@@ -115,7 +115,7 @@ namespace plFormat_Private
     struct FormatSpec
     {
         int fMinimumLength = 0;     /**< Requested minimum padding length */
-        int fPrecision = 0;         /**< Requested precision for floating-point */
+        int fPrecision = -1;        /**< Requested precision for floating-point */
 
         char fPadChar = 0;          /**< Explicit padding char (default is space) */
         Alignment fAlignment = kAlignDefault;   /**< Requested pad alignment */