diff --git a/source_files/ddf/ddf_main.cc b/source_files/ddf/ddf_main.cc
index 9fcbd7726..f8b4b46a7 100644
--- a/source_files/ddf/ddf_main.cc
+++ b/source_files/ddf/ddf_main.cc
@@ -1311,7 +1311,7 @@ void DDFMainGetPercentAny(const char *info, void *storage)
 
     // check that the string is valid
     epi::CStringCopyMax(s, info, 100);
-    for (p = s; epi::IsDigitASCII(*p) || *p == '.'; p++)
+    for (p = s; epi::IsDigitASCII(*p) || *p == '-' || *p == '.'; p++)
     { /* do nothing */
     }
 
diff --git a/source_files/ddf/ddf_weapon.cc b/source_files/ddf/ddf_weapon.cc
index 687948539..d9ea2b1c4 100644
--- a/source_files/ddf/ddf_weapon.cc
+++ b/source_files/ddf/ddf_weapon.cc
@@ -102,7 +102,7 @@ static const DDFCommandList weapon_commands[] = {
     DDF_FIELD("REFIRE_INACCURATE", dummy_weapon, refire_inacc_, DDFMainGetBoolean),
     DDF_FIELD("SHOW_CLIP", dummy_weapon, show_clip_, DDFMainGetBoolean),
     DDF_FIELD("SHARED_CLIP", dummy_weapon, shared_clip_, DDFMainGetBoolean),
-    DDF_FIELD("BOBBING", dummy_weapon, bobbing_, DDFMainGetPercent),
+    DDF_FIELD("BOBBING", dummy_weapon, bobbing_, DDFMainGetPercentAny),
     DDF_FIELD("SWAYING", dummy_weapon, swaying_, DDFMainGetPercent),
     DDF_FIELD("IDLE_WAIT", dummy_weapon, idle_wait_, DDFMainGetTime),
     DDF_FIELD("IDLE_CHANCE", dummy_weapon, idle_chance_, DDFMainGetPercent),