diff --git a/src/fdr/flood_compile.cpp b/src/fdr/flood_compile.cpp
index 2ee5a1c5..62693c30 100644
--- a/src/fdr/flood_compile.cpp
+++ b/src/fdr/flood_compile.cpp
@@ -69,7 +69,7 @@ static
 void updateFloodSuffix(vector<FDRFlood> &tmpFlood, u8 c, u32 suffix) {
     FDRFlood &fl = tmpFlood[c];
     fl.suffix = MAX(fl.suffix, suffix + 1);
-    DEBUG_PRINTF("Updated Flood Suffix for char '%c' to %u\n", c, fl.suffix);
+    DEBUG_PRINTF("Updated Flood Suffix for char 0x%02x to %u\n", c, fl.suffix);
 }
 
 static
@@ -125,8 +125,9 @@ setupFDRFloodControl(const vector<hwlmLiteral> &lits,
         for (u32 i = 0; i < iEnd; i++) {
             if (i < litSize) {
                 if (isDifferent(c, lit.s[litSize - i - 1], lit.nocase)) {
-                    DEBUG_PRINTF("non-flood char in literal[%u] %c != %c\n",
-                                                i, c, lit.s[litSize - i - 1]);
+                    DEBUG_PRINTF("non-flood char in literal[%u]: "
+                                 "0x%02x != 0x%02x\n",
+                                 i, c, lit.s[litSize - i - 1]);
                     upSuffix = MIN(upSuffix, i);
                     loSuffix = MIN(loSuffix, i); // makes sense only for case-less
                     break;